/* ==========================================================================
   Ahmet Faruk Balcı - Kişisel Portföy ve Web Platformu Stilleri
   ========================================================================== */

:root {
  /* Color Palette - Dark Mode (Default) */
  --bg-primary: #0a0d14;
  --bg-secondary: #0f1623;
  --bg-tertiary: #162032;
  --bg-card: rgba(22, 32, 50, 0.7);
  --bg-card-hover: rgba(30, 41, 64, 0.85);
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(56, 189, 248, 0.5);
  --border-glow: rgba(99, 102, 241, 0.4);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverted: #0f172a;

  /* Accents */
  --accent-cyan: #38bdf8;
  --accent-indigo: #6366f1;
  --accent-purple: #a855f7;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;

  /* Gradients */
  --grad-primary: linear-gradient(135deg, #38bdf8 0%, #6366f1 50%, #a855f7 100%);
  --grad-cyan-indigo: linear-gradient(135deg, #38bdf8 0%, #6366f1 100%);
  --grad-surface: linear-gradient(180deg, rgba(255, 255, 255, 0.04) 0%, rgba(255, 255, 255, 0) 100%);
  --grad-glow: radial-gradient(circle at 50% 0%, rgba(99, 102, 241, 0.15) 0%, transparent 70%);

  /* UI Metrics */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.25);

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Menlo, monospace;

  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-tertiary: #e2e8f0;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: rgba(255, 255, 255, 0.98);

  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-focus: rgba(14, 165, 233, 0.6);
  --border-glow: rgba(79, 70, 229, 0.3);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-inverted: #f8fafc;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.15);
  --grad-glow: radial-gradient(circle at 50% 0%, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
}

/* ==========================================================================
   Base & Reset
   ========================================================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  background-image: 
    radial-gradient(at 10% 20%, rgba(56, 189, 248, 0.05) 0px, transparent 50%),
    radial-gradient(at 90% 80%, rgba(168, 85, 247, 0.05) 0px, transparent 50%);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

ul, ol {
  list-style: none;
}

button, input, textarea, select {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}

button {
  cursor: pointer;
}

img, svg {
  display: block;
  max-width: 100%;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ==========================================================================
   Header & Navbar
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 72px;
  z-index: 100;
  background: rgba(10, 13, 20, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--transition-normal), border var(--transition-normal);
}

[data-theme="light"] .site-header {
  background: rgba(248, 250, 252, 0.85);
}

.header-container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.brand-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  overflow: hidden;
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.3);
  border: 1.5px solid var(--accent-cyan);
}

.brand-name {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 800;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-size: 0.925rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 0.4rem 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--grad-primary);
  border-radius: 2px;
  transition: width var(--transition-normal);
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.theme-toggle-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  color: var(--accent-cyan);
  border-color: var(--border-focus);
}

.btn-new-post {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--grad-cyan-indigo);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-new-post:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.45);
}

.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero-section {
  padding: 8.5rem 0 4.5rem;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: -10%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 500px;
  background: var(--grad-glow);
  pointer-events: none;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  align-items: center;
  gap: 3.5rem;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.9rem;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-full);
  color: var(--accent-emerald);
  font-size: 0.825rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.status-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-emerald);
  box-shadow: 0 0 10px var(--accent-emerald);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.hero-title {
  font-size: 3.25rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

.hero-title .gradient-text {
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-roles {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text-secondary);
  height: 2.2rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
  font-family: var(--font-mono);
}

.typewriter-text {
  color: var(--accent-cyan);
}

.cursor-blink {
  display: inline-block;
  color: var(--accent-indigo);
  animation: blink 1s step-end infinite;
}

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

.hero-bio {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 580px;
  margin-bottom: 2rem;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.btn-primary {
  background: var(--grad-primary);
  color: #fff;
  box-shadow: 0 4px 18px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-focus);
  transform: translateY(-2px);
}

.btn-outline {
  border: 1px solid var(--accent-cyan);
  color: var(--accent-cyan);
}

.btn-outline:hover {
  background: rgba(56, 189, 248, 0.1);
  transform: translateY(-2px);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
  max-width: 540px;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-num {
  font-size: 1.65rem;
  font-weight: 800;
  font-family: var(--font-mono);
  background: var(--grad-cyan-indigo);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Hero Visual / Avatar Card */
.hero-visual {
  display: flex;
  justify-content: center;
  position: relative;
}

.avatar-card-wrapper {
  position: relative;
  width: 320px;
  height: 320px;
}

.avatar-backdrop-glow {
  position: absolute;
  inset: -15px;
  background: var(--grad-primary);
  border-radius: var(--radius-full);
  filter: blur(28px);
  opacity: 0.35;
  animation: glowFloat 6s ease-in-out infinite alternate;
}

@keyframes glowFloat {
  0% { transform: scale(0.95); opacity: 0.25; }
  100% { transform: scale(1.05); opacity: 0.45; }
}

.avatar-img-frame {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: var(--radius-full);
  padding: 6px;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.8), rgba(168, 85, 247, 0.8));
  box-shadow: var(--shadow-lg);
}

.avatar-img-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-full);
  background: var(--bg-secondary);
}

.floating-tech-badge {
  position: absolute;
  padding: 0.5rem 0.9rem;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.825rem;
  font-weight: 700;
  animation: float 4s ease-in-out infinite alternate;
}

.floating-tech-badge.badge-1 {
  top: 10px;
  right: -25px;
  animation-delay: 0s;
  color: var(--accent-cyan);
}

.floating-tech-badge.badge-2 {
  bottom: 25px;
  left: -35px;
  animation-delay: 1.5s;
  color: var(--accent-purple);
}

.floating-tech-badge.badge-3 {
  bottom: -15px;
  right: 20px;
  animation-delay: 2.5s;
  color: var(--accent-emerald);
}

@keyframes float {
  0% { transform: translateY(0px); }
  100% { transform: translateY(-8px); }
}

/* ==========================================================================
   Section Headers & Common
   ========================================================================== */

section {
  padding: 5rem 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 3.5rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.825rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-cyan);
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 0.75rem;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   About & Skills Section
   ========================================================================== */

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.about-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  box-shadow: var(--shadow-sm);
}

.about-card-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--accent-cyan);
}

.about-text {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.social-pills-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.social-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.social-pill:hover {
  color: var(--accent-cyan);
  border-color: var(--border-focus);
  background: var(--bg-tertiary);
  transform: translateY(-2px);
}

/* Skills Category Accordions / Cards */
.skills-container {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.skill-category-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: border var(--transition-fast), transform var(--transition-fast);
}

.skill-category-card:hover {
  border-color: var(--border-glow);
}

.category-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.category-title {
  font-size: 1.05rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.skill-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-pill {
  padding: 0.4rem 0.75rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: all var(--transition-fast);
}

.skill-pill:hover {
  border-color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.08);
}

.skill-pill .skill-level {
  font-size: 0.7rem;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
}

/* ==========================================================================
   Projects Section (GitHub Catalog)
   ========================================================================== */

.projects-filter-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
}

.filter-btn {
  padding: 0.5rem 1.15rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-focus);
}

.filter-btn.active {
  background: var(--grad-primary);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.35);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 1.5rem;
}

.project-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal), border var(--transition-normal), box-shadow var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-focus);
  box-shadow: var(--shadow-md);
}

.project-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.project-lang-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
}

.project-lang-badge.lang-python {
  background: rgba(56, 189, 248, 0.12);
  color: var(--accent-cyan);
  border-color: rgba(56, 189, 248, 0.3);
}

.project-lang-badge.lang-kotlin {
  background: rgba(168, 85, 247, 0.12);
  color: var(--accent-purple);
  border-color: rgba(168, 85, 247, 0.3);
}

.project-lang-badge.lang-c {
  background: rgba(245, 158, 11, 0.12);
  color: var(--accent-amber);
  border-color: rgba(245, 158, 11, 0.3);
}

.project-lang-badge.lang-csharp {
  background: rgba(16, 185, 129, 0.12);
  color: var(--accent-emerald);
  border-color: rgba(16, 185, 129, 0.3);
}

.project-lang-badge.lang-other {
  background: rgba(148, 163, 184, 0.12);
  color: var(--text-secondary);
}

.project-name {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.project-desc {
  font-size: 0.925rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
}

.project-tag {
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
}

.project-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
}

.btn-run-live {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.825rem;
  font-weight: 700;
  color: var(--accent-cyan);
  padding: 0.4rem 0.8rem;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.btn-run-live:hover {
  background: var(--accent-cyan);
  color: #0f172a;
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.4);
}

.project-github-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 600;
}

.project-github-link:hover {
  color: var(--text-primary);
}

/* ==========================================================================
   Contact Section
   ========================================================================== */

.contact-card-wrapper {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 3rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  box-shadow: var(--shadow-md);
}

.contact-info-title {
  font-size: 1.85rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.contact-info-text {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 2rem;
}

.contact-channel-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.contact-channel-item {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.channel-icon-box {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--accent-cyan);
}

.channel-meta-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.channel-meta-value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* Contact Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-control {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: border var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
}

textarea.form-control {
  min-height: 120px;
  resize: vertical;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 3rem 0;
  background: var(--bg-secondary);
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
}

.footer-social-links {
  display: flex;
  gap: 1.5rem;
}

.footer-link {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--accent-cyan);
}

/* ==========================================================================
   Floating UI (Back to top, Toast)
   ========================================================================== */

.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--grad-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-normal);
  z-index: 90;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.toast-container {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  z-index: 1000;
  pointer-events: none;
}

.toast-message {
  padding: 0.75rem 1.5rem;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-focus);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  font-size: 0.9rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  animation: toastIn 0.3s ease, toastOut 0.3s ease 2.7s forwards;
  pointer-events: auto;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(-12px); }
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

@media (max-width: 992px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 3rem;
  }

  .hero-roles {
    justify-content: center;
  }

  .hero-bio {
    margin: 0 auto 2rem;
  }

  .hero-cta-group {
    justify-content: center;
  }

  .hero-stats {
    margin: 0 auto;
  }

  .about-grid {
    grid-template-columns: 1fr;
  }

  .contact-card-wrapper {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding: 2rem;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.5rem;
  }

  .nav-menu {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-subtle);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1rem;
    display: none;
  }

  .nav-menu.open {
    display: flex;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .avatar-card-wrapper {
    width: 240px;
    height: 240px;
  }
}