/* =============================================
   EMDevStudio - Main Stylesheet
   Dark Terminal / Hacker Aesthetic
   ============================================= */

/* --- Variables --- */
:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #0f1520;
    --bg-card: #111827;
    --bg-card-hover: #161f30;
    --accent-green: #00ff88;
    --accent-cyan: #00d4ff;
    --accent-blue: #0066ff;
    --accent-purple: #7c3aed;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #475569;
    --border: rgba(0, 255, 136, 0.15);
    --border-hover: rgba(0, 255, 136, 0.4);
    --glow-green: 0 0 20px rgba(0, 255, 136, 0.3);
    --glow-cyan: 0 0 20px rgba(0, 212, 255, 0.3);
    --font-mono: 'Share Tech Mono', monospace;
    --font-display: 'Exo 2', sans-serif;
    --font-body: 'Rajdhani', sans-serif;
    --nav-height: 70px;
    --radius: 8px;
    --transition: 0.3s ease;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 16px;
    line-height: 1.7;
    overflow-x: hidden;
}

a { color: var(--accent-green); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-cyan); }

img { max-width: 100%; height: auto; display: block; }

ul { list-style: none; }

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--accent-green); border-radius: 3px; }

/* =============================================
   COUNTDOWN BANNER
   ============================================= */
.countdown-banner {
    background: linear-gradient(135deg, #0a1628 0%, #051020 100%);
    border-bottom: 1px solid var(--accent-cyan);
    padding: 10px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    position: sticky;
    top: 0;
    z-index: 1002;
    box-shadow: 0 2px 20px rgba(0, 212, 255, 0.2);
}

.countdown-banner-inner {
    display: flex;
    align-items: center;
    gap: 20px;
    flex: 1;
    flex-wrap: wrap;
    justify-content: center;
}

.countdown-label {
    font-family: var(--font-mono);
    color: var(--accent-cyan);
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 1px;
}

.countdown-desc {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.countdown-timer-inline {
    display: flex;
    align-items: center;
    gap: 4px;
}

.cd-unit {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 4px;
    padding: 4px 10px;
    min-width: 50px;
}

.cd-unit span {
    font-family: var(--font-mono);
    font-size: 1.2rem;
    color: var(--accent-cyan);
    line-height: 1;
    font-weight: bold;
}

.cd-unit small {
    font-size: 0.55rem;
    color: var(--text-muted);
    letter-spacing: 1px;
    margin-top: 2px;
}

.cd-sep {
    font-family: var(--font-mono);
    color: var(--accent-cyan);
    font-size: 1.2rem;
    font-weight: bold;
    margin: 0 2px;
    padding-bottom: 12px;
}



/* =============================================
   NAVBAR
   ============================================= */
.navbar {
    position: sticky;
    top: 0;  /* JS ile countdown yüksekliğine göre güncellenir */
    z-index: 1000;
    height: var(--nav-height);
    background: rgba(10, 14, 23, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    transition: all var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--glow-green);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-mono);
    font-size: 1.3rem;
    font-weight: bold;
    color: var(--text-primary);
    letter-spacing: 1px;
    transition: all var(--transition);
}
.nav-logo:hover { color: var(--text-primary); text-shadow: var(--glow-green); }
.logo-bracket { color: var(--accent-green); }
.logo-accent { color: var(--accent-cyan); }

.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-link {
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: var(--radius);
    transition: all var(--transition);
    position: relative;
    letter-spacing: 0.5px;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--accent-green);
    transition: width var(--transition);
    border-radius: 1px;
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-green);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 60%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--accent-green);
    border-radius: 1px;
    transition: all 0.3s;
}

/* =============================================
   MESSAGES
   ============================================= */
.messages-container {
    position: fixed;
    top: calc(var(--nav-height) + 16px);
    right: 16px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-width: 380px;
}

.alert {
    padding: 14px 40px 14px 18px;
    border-radius: var(--radius);
    border: 1px solid;
    font-family: var(--font-body);
    font-size: 0.95rem;
    position: relative;
    animation: slideIn 0.3s ease;
}

.alert-success {
    background: rgba(0, 255, 136, 0.1);
    border-color: var(--accent-green);
    color: var(--accent-green);
}

.alert button {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: inherit;
    cursor: pointer;
    font-size: 1rem;
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* =============================================
   MAIN CONTENT
   ============================================= */
.main-content {
    min-height: calc(100vh - var(--nav-height));
}

/* =============================================
   SECTIONS
   ============================================= */
.section {
    padding: 100px 0;
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    font-family: var(--font-mono);
    color: var(--accent-green);
    font-size: 0.85rem;
    letter-spacing: 2px;
    display: block;
    margin-bottom: 12px;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.2;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-top: 12px;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}

.section-cta {
    text-align: center;
    margin-top: 50px;
}

/* =============================================
   BUTTONS
   ============================================= */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: var(--accent-green);
    border: 1px solid var(--accent-green);
    padding: 12px 28px;
    border-radius: var(--radius);
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--accent-green);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: -1;
}

.btn-primary:hover {
    color: var(--bg-primary);
    box-shadow: var(--glow-green);
}

.btn-primary:hover::before {
    transform: translateX(0);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    padding: 12px 28px;
    border-radius: var(--radius);
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-secondary:hover {
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
    box-shadow: var(--glow-cyan);
}

.btn-lg { padding: 16px 36px; font-size: 1.05rem; }

/* =============================================
   HERO SECTION
   ============================================= */
.hero {
    min-height: calc(100vh - var(--nav-height));
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding: 80px 0 60px;
}

.hero-bg-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 255, 136, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 255, 136, 0.04) 1px, transparent 1px);
    background-size: 50px 50px;
    z-index: 0;
}

.hero-bg-grid::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 60% 60% at 70% 40%, rgba(0, 212, 255, 0.06) 0%, transparent 70%),
                radial-gradient(ellipse 50% 50% at 20% 80%, rgba(0, 255, 136, 0.05) 0%, transparent 70%);
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content { display: flex; flex-direction: column; gap: 24px; }

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 255, 136, 0.08);
    border: 1px solid rgba(0, 255, 136, 0.25);
    color: var(--accent-green);
    padding: 6px 16px;
    border-radius: 20px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 1px;
    width: fit-content;
}

.badge-dot {
    width: 7px;
    height: 7px;
    background: var(--accent-green);
    border-radius: 50%;
    animation: pulse 2s infinite;
    box-shadow: 0 0 6px var(--accent-green);
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(0.8); }
}

.hero-title { line-height: 1.15; }

.hero-greeting {
    display: block;
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--text-secondary);
    letter-spacing: 2px;
    margin-bottom: 6px;
}

.hero-name {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(2.8rem, 5vw, 4rem);
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -1px;
}

.hero-typed-wrapper {
    display: block;
    font-family: var(--font-mono);
    font-size: clamp(1rem, 2vw, 1.4rem);
    color: var(--accent-cyan);
    margin-top: 8px;
    min-height: 1.8em;
}

.cursor {
    animation: blink 1s infinite;
    color: var(--accent-green);
}

@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

.hero-desc {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 480px;
    line-height: 1.8;
}

.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-stats {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-top: 8px;
}

.stat { text-align: center; }

.stat-num {
    display: block;
    font-family: var(--font-mono);
    font-size: 1.6rem;
    font-weight: bold;
    color: var(--accent-green);
    line-height: 1;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-top: 4px;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border);
}

/* Terminal window */
.terminal-window {
    background: #0d1117;
    border: 1px solid rgba(0, 255, 136, 0.2);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 40px rgba(0, 255, 136, 0.05);
    font-family: var(--font-mono);
}

.terminal-header {
    background: #161b22;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.t-btn {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}
.t-red { background: #ff5f57; }
.t-yellow { background: #febc2e; }
.t-green { background: #28c840; }

.t-title {
    margin-left: 8px;
    color: var(--text-muted);
    font-size: 0.8rem;
}

.terminal-body {
    padding: 20px;
    font-size: 0.88rem;
    line-height: 1.9;
}

.t-line { display: block; }
.t-prompt { color: var(--accent-green); margin-right: 8px; }
.t-cmd { color: #c9d1d9; }
.t-output { color: #8b949e; padding-left: 20px; }
.t-green { color: var(--accent-green) !important; }
.t-cyan { color: var(--accent-cyan) !important; }
.t-cursor { animation: blink 1s infinite; color: var(--accent-green); }

.hero-scroll-hint {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 2px;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

/* =============================================
   EXPERTISE SECTION
   ============================================= */
.expertise-section { background: var(--bg-secondary); }

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.expertise-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.expertise-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-green), transparent);
    opacity: 0;
    transition: opacity var(--transition);
}

.expertise-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3), var(--glow-green);
}

.expertise-card:hover::before { opacity: 1; }

.card-icon-wrap {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    margin-bottom: 20px;
}

.card-icon-wrap.security {
    background: rgba(0, 255, 136, 0.1);
    color: var(--accent-green);
    border: 1px solid rgba(0, 255, 136, 0.2);
}
.card-icon-wrap.python {
    background: rgba(0, 212, 255, 0.1);
    color: var(--accent-cyan);
    border: 1px solid rgba(0, 212, 255, 0.2);
}
.card-icon-wrap.web {
    background: rgba(124, 58, 237, 0.1);
    color: #a78bfa;
    border: 1px solid rgba(124, 58, 237, 0.2);
}

.expertise-card h3 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.expertise-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 20px;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.card-tags li {
    background: rgba(0, 255, 136, 0.08);
    border: 1px solid rgba(0, 255, 136, 0.15);
    color: var(--accent-green);
    padding: 3px 10px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

/* =============================================
   TECH SECTION
   ============================================= */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 16px;
}

.tech-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 20px 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    transition: all var(--transition);
    cursor: default;
}

.tech-item:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    transform: translateY(-4px);
    box-shadow: var(--glow-green);
}

.tech-item i {
    font-size: 2rem;
    color: var(--accent-green);
    transition: color var(--transition);
}

.tech-item:hover i { color: var(--accent-cyan); }

.tech-item span {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
}

/* =============================================
   PROJECTS GRID
   ============================================= */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    transition: all var(--transition);
}

.project-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.project-img {
    height: 200px;
    position: relative;
    overflow: hidden;
    background: var(--bg-secondary);
}

.project-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.project-card:hover .project-img img { transform: scale(1.05); }

.no-img {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--bg-secondary), #0a1628);
}

.no-img-icon {
    font-size: 3rem;
    color: rgba(0, 255, 136, 0.2);
}

.project-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    opacity: 0;
    transition: opacity var(--transition);
}

.project-card:hover .project-overlay { opacity: 1; }

.overlay-btn {
    width: 44px;
    height: 44px;
    background: rgba(0, 255, 136, 0.15);
    border: 1px solid var(--accent-green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-green);
    font-size: 1.1rem;
    transition: all var(--transition);
}

.overlay-btn:hover {
    background: var(--accent-green);
    color: var(--bg-primary);
}

.project-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.project-cat {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 1px;
    padding: 3px 10px;
    border-radius: 3px;
    width: fit-content;
    text-transform: uppercase;
}
.project-cat.web { background: rgba(124, 58, 237, 0.15); color: #a78bfa; border: 1px solid rgba(124, 58, 237, 0.3); }
.project-cat.security { background: rgba(0, 255, 136, 0.1); color: var(--accent-green); border: 1px solid rgba(0, 255, 136, 0.2); }
.project-cat.python { background: rgba(0, 212, 255, 0.1); color: var(--accent-cyan); border: 1px solid rgba(0, 212, 255, 0.2); }
.project-cat.other { background: rgba(148, 163, 184, 0.1); color: var(--text-secondary); border: 1px solid rgba(148, 163, 184, 0.2); }

.project-body h3 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.project-body p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.6;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 4px;
}

.project-tags span {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-muted);
    padding: 2px 8px;
    border-radius: 3px;
    font-family: var(--font-mono);
    font-size: 0.72rem;
}

/* =============================================
   CTA SECTION
   ============================================= */
.cta-section {
    padding: 120px 0;
    text-align: center;
    background: var(--bg-secondary);
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 50% 80% at 50% 50%, rgba(0, 255, 136, 0.06) 0%, transparent 70%);
}

.cta-container {
    position: relative;
    z-index: 1;
    max-width: 700px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.cta-glitch {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 800;
    color: var(--text-primary);
    position: relative;
}

.cta-glitch::before,
.cta-glitch::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
}

.cta-glitch::before {
    color: var(--accent-cyan);
    animation: glitch1 3s infinite;
    clip-path: polygon(0 0, 100% 0, 100% 35%, 0 35%);
}

.cta-glitch::after {
    color: var(--accent-green);
    animation: glitch2 3s infinite;
    clip-path: polygon(0 65%, 100% 65%, 100% 100%, 0 100%);
}

@keyframes glitch1 {
    0%, 90%, 100% { transform: none; opacity: 0; }
    92% { transform: translate(-3px, 0); opacity: 0.7; }
    94% { transform: translate(3px, 0); opacity: 0.7; }
    96% { transform: none; opacity: 0; }
}

@keyframes glitch2 {
    0%, 93%, 100% { transform: none; opacity: 0; }
    95% { transform: translate(3px, 0); opacity: 0.7; }
    97% { transform: translate(-3px, 0); opacity: 0.7; }
    99% { transform: none; opacity: 0; }
}

.cta-section p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* =============================================
   PAGE HERO (inner pages)
   ============================================= */
.page-hero {
    padding: 80px 0 60px;
    text-align: center;
    position: relative;
    overflow: hidden;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
}

.page-hero-bg {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 255, 136, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 255, 136, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    z-index: 0;
}

.page-hero-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.page-tag {
    font-family: var(--font-mono);
    color: var(--accent-green);
    font-size: 0.85rem;
    letter-spacing: 2px;
}

.page-hero-content h1 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    color: var(--text-primary);
}

.page-hero-content p {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

/* =============================================
   FILTER BAR
   ============================================= */
.filter-bar {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 40px;
    justify-content: center;
}

.filter-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 20px;
    border-radius: 6px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    transition: all var(--transition);
    cursor: pointer;
}

.filter-btn:hover,
.filter-btn.active {
    background: rgba(0, 255, 136, 0.1);
    border-color: var(--accent-green);
    color: var(--accent-green);
}

/* =============================================
   CERTIFICATES
   ============================================= */
.certs-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.cert-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    transition: all var(--transition);
}

.cert-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3);
}

.cert-img {
    height: 180px;
    overflow: hidden;
    background: var(--bg-secondary);
}

.cert-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.cert-card:hover .cert-img img { transform: scale(1.03); }

.cert-img.no-img {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: rgba(0, 255, 136, 0.2);
}

.cert-body { padding: 20px; }

.cert-issuer {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--accent-cyan);
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 10px;
}

.cert-body h3 {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.cert-body p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.6;
    margin-bottom: 14px;
}

.cert-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid var(--border);
}

.cert-date {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
}

.cert-verify-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-green);
    border: 1px solid rgba(0, 255, 136, 0.3);
    padding: 4px 10px;
    border-radius: 4px;
    transition: all var(--transition);
}

.cert-verify-btn:hover {
    background: rgba(0, 255, 136, 0.1);
    color: var(--accent-green);
}

/* =============================================
   ABOUT PAGE
   ============================================= */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 40px;
}

.about-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 36px;
    transition: all var(--transition);
}

.about-card:hover {
    border-color: var(--border-hover);
}

.full-width { grid-column: 1 / -1; }

.about-card-icon {
    width: 52px;
    height: 52px;
    background: rgba(0, 255, 136, 0.1);
    border: 1px solid rgba(0, 255, 136, 0.2);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: var(--accent-green);
    margin-bottom: 20px;
}

.about-card h2 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.about-card p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 14px;
}

.expertise-list { display: flex; flex-direction: column; gap: 12px; }

.expertise-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 6px;
    border: 1px solid var(--border);
    transition: all var(--transition);
}

.expertise-list li:hover {
    border-color: var(--border-hover);
    color: var(--text-primary);
    background: rgba(0, 255, 136, 0.04);
}

.expertise-list i {
    color: var(--accent-green);
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-top: 28px;
}

.value-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px 16px;
    text-align: center;
    transition: all var(--transition);
}

.value-item:hover {
    border-color: var(--border-hover);
    background: rgba(0, 255, 136, 0.04);
}

.value-item i {
    font-size: 1.5rem;
    color: var(--accent-green);
    margin-bottom: 10px;
    display: block;
}

.value-item h4 {
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.value-item p {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.5;
}

.about-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    padding-top: 20px;
}

/* =============================================
   CONTACT PAGE
   ============================================= */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 40px;
    align-items: start;
}

.contact-info h2 {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.contact-info > p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 32px;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 32px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: all var(--transition);
}

.contact-item:hover {
    border-color: var(--border-hover);
}

.contact-item-icon {
    width: 44px;
    height: 44px;
    background: rgba(0, 255, 136, 0.1);
    border: 1px solid rgba(0, 255, 136, 0.2);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-green);
    font-size: 1.1rem;
    flex-shrink: 0;
}

.contact-item h4 {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-muted);
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 4px;
}

.contact-item p {
    color: var(--text-secondary);
    font-size: 0.92rem;
}

.contact-social h4 {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-muted);
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.social-links-row {
    display: flex;
    gap: 12px;
}

.social-link-lg {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 14px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-family: var(--font-mono);
    transition: all var(--transition);
    flex: 1;
}

.social-link-lg i { font-size: 1.4rem; }

.social-link-lg:hover {
    color: var(--accent-green);
    border-color: var(--accent-green);
    background: rgba(0, 255, 136, 0.08);
}

.contact-form-wrap {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 36px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.form-group input,
.form-group textarea {
    background: var(--bg-secondary) !important;
    border: 1px solid var(--border) !important;
    border-radius: 6px !important;
    color: var(--text-primary) !important;
    padding: 12px 16px !important;
    font-family: var(--font-body) !important;
    font-size: 1rem !important;
    transition: all var(--transition) !important;
    outline: none !important;
    box-shadow: none !important;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent-green) !important;
    box-shadow: 0 0 0 3px rgba(0, 255, 136, 0.1) !important;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted) !important;
}

.form-error {
    color: #f87171;
    font-size: 0.82rem;
    font-family: var(--font-mono);
}

.btn-submit {
    width: 100%;
    justify-content: center;
    padding: 14px;
    font-size: 1rem;
}

/* =============================================
   FOOTER
   ============================================= */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 60px 0 0;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr;
    gap: 48px;
    padding-bottom: 48px;
}

.footer-logo {
    font-family: var(--font-mono);
    font-size: 1.3rem;
    font-weight: bold;
    color: var(--text-primary);
    margin-bottom: 14px;
}

.footer-tagline {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.7;
    margin-bottom: 24px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 40px;
    height: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
    transition: all var(--transition);
}

.social-link:hover {
    color: var(--accent-green);
    border-color: var(--accent-green);
    background: rgba(0, 255, 136, 0.08);
    box-shadow: var(--glow-green);
}

.footer-links h4,
.footer-contact h4 {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-muted);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 18px;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all var(--transition);
}

.footer-links a i {
    font-size: 0.65rem;
    color: var(--accent-green);
}

.footer-links a:hover {
    color: var(--accent-green);
    padding-left: 4px;
}

.footer-contact ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 20px;
}

.footer-contact li {
    color: var(--text-secondary);
    font-size: 0.92rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-contact li i {
    color: var(--accent-green);
    width: 16px;
    text-align: center;
    flex-shrink: 0;
}

.btn-footer-cta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: transparent;
    color: var(--accent-green);
    border: 1px solid rgba(0, 255, 136, 0.4);
    padding: 9px 20px;
    border-radius: 6px;
    font-family: var(--font-body);
    font-size: 0.88rem;
    font-weight: 600;
    transition: all var(--transition);
    margin-top: 8px;
}

.btn-footer-cta:hover {
    background: rgba(0, 255, 136, 0.1);
    color: var(--accent-green);
    box-shadow: var(--glow-green);
}

.footer-bottom {
    border-top: 1px solid var(--border);
    padding: 20px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.85rem;
    font-family: var(--font-mono);
}

.heart { color: var(--accent-green); }

/* =============================================
   EMPTY STATE
   ============================================= */
.empty-state {
    text-align: center;
    padding: 80px 0;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 16px;
    display: block;
    color: rgba(0, 255, 136, 0.2);
}

.empty-state h3 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 1024px) {
    .hero-container { grid-template-columns: 1fr; gap: 48px; }
    .hero-visual { order: -1; max-width: 500px; margin: 0 auto; width: 100%; }
    .expertise-grid { grid-template-columns: 1fr; gap: 20px; }
    .tech-grid { grid-template-columns: repeat(4, 1fr); }
    .projects-grid { grid-template-columns: repeat(2, 1fr); }
    .certs-grid { grid-template-columns: repeat(2, 1fr); }
    .about-grid { grid-template-columns: 1fr; }
    .values-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: var(--nav-height);  /* JS navbar top + nav-height ile override edilir */
        left: 0;
        right: 0;
        background: rgba(10, 14, 23, 0.98);
        backdrop-filter: blur(16px);
        flex-direction: column;
        padding: 20px;
        gap: 4px;
        border-bottom: 1px solid var(--border);
        transform: translateY(-120%);
        opacity: 0;
        transition: all 0.3s ease;
        z-index: 999;
    }
    .nav-menu.open { transform: translateY(0); opacity: 1; }
    .nav-toggle { display: flex; }
    .nav-link { width: 100%; padding: 12px 16px; }
    .hero { padding: 60px 0 40px; }
    .hero-name { font-size: 2.4rem; }
    .hero-actions { flex-direction: column; align-items: flex-start; }
    .section { padding: 70px 0; }
    .tech-grid { grid-template-columns: repeat(3, 1fr); }
    .projects-grid { grid-template-columns: 1fr; }
    .certs-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .expertise-grid { grid-template-columns: 1fr; }
    .countdown-banner-inner { flex-direction: column; gap: 8px; }
    .countdown-timer-inline { flex-wrap: wrap; justify-content: center; }
    .cd-unit { min-width: 44px; padding: 3px 8px; }
    .cd-unit span { font-size: 1rem; }
    .values-grid { grid-template-columns: 1fr 1fr; }
    /* Mobil section padding */
    .section { padding: 50px 0; }
    .section-container { padding: 0 16px; }
    .page-hero { padding: 50px 0 40px; }
    /* Mobil hero */
    .hero { padding: 40px 0 30px; min-height: auto; }
    .hero-container { padding: 0 16px; gap: 32px; }
    .hero-stats { gap: 12px; }
    .stat-num { font-size: 1.3rem; }
    /* Mobil terminal */
    .terminal-body { font-size: 0.78rem; padding: 14px; }
    /* Mobil footer */
    .footer-grid { padding: 0 16px 32px; }
    .footer-container { padding: 0; }
    /* Mobil about */
    .about-card { padding: 24px 20px; }
    .about-cta { flex-direction: column; }
    .about-cta .btn-primary, .about-cta .btn-secondary { width: 100%; justify-content: center; }
    /* Mobil contact */
    .contact-form-wrap { padding: 24px 16px; }
    .social-links-row { gap: 8px; }
    /* Mobil filter */
    .filter-bar { gap: 8px; }
    .filter-btn { padding: 6px 14px; font-size: 0.82rem; }
    /* Mobil expertise */
    .expertise-card { padding: 24px 20px; }
    /* Mobil tech tooltip - mobilde tooltip yerine title göster */
    .tech-tooltip { display: none; }
}

@media (max-width: 480px) {
    .tech-grid { grid-template-columns: repeat(3, 1fr); }
    .hero-stats { gap: 10px; }
    .stat-divider { display: none; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .values-grid { grid-template-columns: 1fr; }
    .hero-name { font-size: 2rem; }
    .hero-typed-wrapper { font-size: 0.95rem; }
    .hero-desc { font-size: 1rem; }
    .cta-glitch { font-size: 1.8rem; }
    .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
    .hero-actions .btn-primary, .hero-actions .btn-secondary { width: auto; }
    .section-title { font-size: 1.7rem; }
    .cd-unit { min-width: 38px; padding: 2px 6px; }
    .cd-unit span { font-size: 0.9rem; }
    .countdown-label { font-size: 0.78rem; }
    .tech-item i { font-size: 1.7rem !important; }
    .tech-item span { font-size: 0.68rem; }
}

/* =============================================
   X (Twitter) SVG ICON FIX
   ============================================= */
.social-link svg,
.social-link-lg svg {
    width: 1.1rem;
    height: 1.1rem;
    fill: currentColor;
    display: block;
}

/* =============================================
   TECH TOOLTIP - overflow fix
   ============================================= */
.tech-section .section-container {
    overflow: visible;
}
.tech-grid {
    overflow: visible;
    position: relative;
}
/* First row tooltips go down on small screens */
@media (max-width: 768px) {
    .tech-tooltip {
        bottom: auto;
        top: calc(100% + 12px);
        width: 180px;
    }
    .tech-tooltip::after {
        top: auto;
        bottom: 100%;
        border-top-color: transparent;
        border-bottom-color: rgba(0,255,136,0.4);
    }
}

/* =============================================
   DİL DEĞİŞTİRİCİ (TR/EN)
   ============================================= */
.lang-switcher { position: relative; }

.lang-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(0,255,136,0.08);
    border: 1px solid rgba(0,255,136,0.25);
    color: var(--accent-green);
    padding: 6px 14px;
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.lang-btn i { font-size: 0.65rem; transition: transform var(--transition); }

.lang-btn:hover {
    background: rgba(0,255,136,0.15);
    border-color: var(--accent-green);
}

.lang-dropdown { position: relative; }

.lang-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: #0d1117;
    border: 1px solid rgba(0,255,136,0.3);
    border-radius: 8px;
    min-width: 130px;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: all 0.2s ease;
    z-index: 500;
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}

.lang-dropdown:hover .lang-menu,
.lang-dropdown:focus-within .lang-menu {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.lang-dropdown:hover .lang-btn i {
    transform: rotate(180deg);
}

.lang-menu li a {
    display: block;
    padding: 10px 16px;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.82rem;
    transition: all var(--transition);
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.lang-menu li:last-child a { border-bottom: none; }

.lang-menu li a:hover {
    background: rgba(0,255,136,0.08);
    color: var(--accent-green);
    padding-left: 20px;
}

/* Mobile lang switcher */
@media (max-width: 768px) {
    .lang-switcher { width: 100%; }
    .lang-btn { width: 100%; justify-content: center; }
    .lang-menu {
        position: static;
        opacity: 1;
        pointer-events: auto;
        transform: none;
        border: none;
        background: transparent;
        box-shadow: none;
        display: none;
    }
    .lang-dropdown:hover .lang-menu { display: block; }
}

/* Dil form butonu */
.lang-form-btn {
    display: block;
    width: 100%;
    padding: 10px 16px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.82rem;
    text-align: left;
    cursor: pointer;
    transition: all var(--transition);
    border-bottom: 1px solid rgba(255,255,255,0.05);
}
.lang-form-btn:hover {
    background: rgba(0,255,136,0.08);
    color: var(--accent-green);
    padding-left: 20px;
}