/* ==========================================================================
   Dr. Reza Mirzaei - Sedimentology, Petrology & Mining Geology Portfolio
   Fully Responsive Multi-Language (FA / EN / AR) Styling System (RTL & LTR)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Vazirmatn:wght@300;400;500;600;700;800;900&display=swap');

:root {
  --bg-primary: #080c14;
  --bg-secondary: #0f172a;
  --bg-card: rgba(15, 23, 42, 0.78);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(16, 185, 129, 0.3);

  --accent-emerald: #10b981;
  --accent-emerald-glow: rgba(16, 185, 129, 0.4);
  --accent-cyan: #06b6d4;
  --accent-amber: #f59e0b;
  --accent-gold: #d97706;
  --accent-purple: #8b5cf6;

  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;

  --font-family: 'Vazirmatn', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --transition-fast: 0.25s ease;
  --transition-normal: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  --box-shadow-glass: 0 8px 32px 0 rgba(0, 0, 0, 0.4);
  --box-shadow-glow: 0 0 25px rgba(16, 185, 129, 0.25);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  direction: rtl;
}

html[dir="ltr"] {
  direction: ltr;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.7;
  overflow-x: hidden;
  position: relative;
  background-image: 
    radial-gradient(circle at 15% 20%, rgba(16, 185, 129, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 60%, rgba(6, 182, 212, 0.07) 0%, transparent 45%),
    radial-gradient(circle at 50% 90%, rgba(245, 158, 11, 0.05) 0%, transparent 50%);
  background-attachment: fixed;
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: #1e293b;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-emerald);
}

/* Container */
.container {
  width: 90%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 800;
  line-height: 1.3;
  color: #ffffff;
}

.gradient-text {
  background: linear-gradient(135deg, #ffffff 0%, var(--accent-emerald) 50%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-gold {
  background: linear-gradient(135deg, #fef08a 0%, var(--accent-amber) 60%, var(--accent-gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Header & Navbar */
.navbar {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 1000;
  padding: 1.2rem 0;
  transition: var(--transition-normal);
}

.navbar.scrolled {
  background: rgba(8, 12, 20, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-glass);
  padding: 0.8rem 0;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  text-decoration: none;
  color: #fff;
  font-weight: 800;
  font-size: 1.25rem;
}

.brand-logo i {
  font-size: 1.6rem;
  color: var(--accent-emerald);
  filter: drop-shadow(0 0 10px var(--accent-emerald));
}

.nav-right-box {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.6rem;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition-fast);
  position: relative;
  padding: 0.4rem 0;
}

.nav-links a:hover,
.nav-links a.active {
  color: #ffffff;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-emerald), var(--accent-cyan));
  transition: var(--transition-normal);
  border-radius: 2px;
}

html[dir="ltr"] .nav-links a::after {
  right: auto;
  left: 0;
}

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

.btn-contact-nav {
  padding: 0.6rem 1.4rem;
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(6, 182, 212, 0.2));
  border: 1px solid var(--accent-emerald);
  color: #ffffff !important;
  border-radius: var(--radius-full);
  font-weight: 600;
  transition: var(--transition-normal);
}

.btn-contact-nav:hover {
  background: var(--accent-emerald);
  box-shadow: 0 0 20px var(--accent-emerald-glow);
  transform: translateY(-2px);
}

/* Header Multi-Language Switcher Dropdown */
.lang-selector-box {
  position: relative;
  display: flex;
  align-items: center;
}

.lang-select {
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid var(--border-glow);
  color: #fff;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  font-family: var(--font-family);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  outline: none;
  transition: var(--transition-fast);
}

.lang-select:hover, .lang-select:focus {
  border-color: var(--accent-emerald);
  box-shadow: 0 0 15px rgba(16, 185, 129, 0.3);
}

.lang-select option {
  background: var(--bg-secondary);
  color: #fff;
}

/* Mobile Hamburger Button */
.mobile-menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-glass);
  color: #fff;
  font-size: 1.4rem;
  padding: 0.5rem 0.8rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-fast);
}

.mobile-menu-toggle:hover {
  border-color: var(--accent-emerald);
  color: var(--accent-emerald);
}

/* Hero Section */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 5rem;
  overflow: hidden;
}

#canvas-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 70% 50%, rgba(8, 12, 20, 0.3) 0%, rgba(8, 12, 20, 0.88) 75%);
  z-index: 2;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 3;
  max-width: 750px;
  padding: 3rem 0;
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 1.2rem;
  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: 0.88rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  backdrop-filter: blur(8px);
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 900;
  letter-spacing: -0.5px;
  margin-bottom: 1rem;
  line-height: 1.25;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-muted);
  margin-bottom: 2.2rem;
  font-weight: 400;
}

.hero-buttons {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  flex-wrap: wrap;
}

.btn-primary {
  padding: 0.9rem 2rem;
  background: linear-gradient(135deg, var(--accent-emerald) 0%, #059669 100%);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 700;
  font-family: var(--font-family);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  transition: var(--transition-normal);
  box-shadow: 0 10px 25px rgba(16, 185, 129, 0.3);
  text-decoration: none;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 35px rgba(16, 185, 129, 0.5);
  background: linear-gradient(135deg, #34d399 0%, #10b981 100%);
}

.btn-glass {
  padding: 0.9rem 2rem;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-glass);
  color: #fff;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font-family);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  transition: var(--transition-normal);
  text-decoration: none;
}

.btn-glass:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--accent-cyan);
  transform: translateY(-3px);
}

/* 3D Control Hints floating box */
.control-hint-box {
  position: absolute;
  left: 2rem;
  bottom: 2.5rem;
  z-index: 3;
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 0.9rem 1.3rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

html[dir="ltr"] .control-hint-box {
  left: auto;
  right: 2rem;
}

.control-hint-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.control-hint-item i {
  color: var(--accent-emerald);
}

/* Section Common Styling */
.section {
  padding: 6rem 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 750px;
  margin: 0 auto 4rem auto;
}

.section-subtitle {
  color: var(--accent-emerald);
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 0.5rem;
  display: block;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 1rem;
}

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

/* Glass Card Component */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 2.2rem;
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.glass-card:hover {
  border-color: rgba(16, 185, 129, 0.4);
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5), 0 0 30px rgba(16, 185, 129, 0.15);
}

/* About Section */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3.5rem;
  align-items: center;
}

.about-image-wrapper {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-glass);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.6);
  max-height: 540px;
}

.about-image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: var(--transition-normal);
}

.about-image-wrapper:hover img {
  transform: scale(1.03);
}

.about-experience-badge {
  position: absolute;
  bottom: 1.5rem;
  right: 1.5rem;
  background: rgba(8, 12, 20, 0.88);
  backdrop-filter: blur(12px);
  border: 1px solid var(--accent-emerald);
  padding: 1rem 1.4rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 1rem;
}

html[dir="ltr"] .about-experience-badge {
  right: auto;
  left: 1.5rem;
}

.exp-num {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--accent-emerald);
  line-height: 1;
}

.exp-text {
  font-size: 0.85rem;
  color: #fff;
  font-weight: 600;
  white-space: pre-line;
}

.about-bio-text {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 1.5rem;
  text-align: justify;
}

.about-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
  margin-top: 2rem;
}

.stat-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 1.2rem 1rem;
  text-align: center;
}

.stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent-cyan);
  margin-bottom: 0.3rem;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* Specialties Section */
.specialties-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 2rem;
}

.spec-icon-box {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(6, 182, 212, 0.15));
  border: 1px solid var(--border-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--accent-emerald);
  margin-bottom: 1.5rem;
}

.spec-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
}

.spec-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

.spec-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.spec-tag {
  font-size: 0.78rem;
  padding: 0.3rem 0.8rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-full);
  color: var(--text-muted);
}

/* Interactive 3D Rock Workshop & Petrography Explorer */
.workshop-container {
  background: radial-gradient(circle at 50% 50%, rgba(15, 23, 42, 0.9) 0%, rgba(8, 12, 20, 0.98) 100%);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.7);
}

.workshop-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  min-height: 540px;
}

.workshop-canvas-box {
  position: relative;
  background: #04060a;
  min-height: 380px;
}

#workshop-3d-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.workshop-toolbar {
  position: absolute;
  top: 0.8rem;
  right: 0.8rem;
  left: 0.8rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(10px);
  padding: 0.6rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-glass);
  z-index: 10;
}

.tool-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  color: var(--text-muted);
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-family: var(--font-family);
  cursor: pointer;
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.tool-btn.active, .tool-btn:hover {
  background: var(--accent-emerald);
  color: #fff;
  border-color: var(--accent-emerald);
}

.workshop-info-panel {
  padding: 2.2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-right: 1px solid var(--border-glass);
}

html[dir="ltr"] .workshop-info-panel {
  border-right: none;
  border-left: 1px solid var(--border-glass);
}

.workshop-panel-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 0.8rem;
}

.workshop-panel-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.8rem;
}

.param-list {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  margin-bottom: 2rem;
}

.param-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--border-glass);
}

.param-name {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.param-val {
  color: var(--accent-cyan);
  font-weight: 700;
  font-size: 0.92rem;
}

/* Image Feature Cards */
.feature-showcase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 3.5rem;
}

.showcase-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-glass);
  height: 360px;
}

.showcase-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.showcase-card:hover img {
  transform: scale(1.08);
}

.showcase-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(8, 12, 20, 0.95) 0%, rgba(8, 12, 20, 0.4) 60%, transparent 100%);
  padding: 1.8rem;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.showcase-tag {
  color: var(--accent-amber);
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.showcase-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 0.5rem;
}

.showcase-desc {
  color: var(--text-muted);
  font-size: 0.88rem;
}

/* Consulting & Services */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 2.2rem;
  transition: var(--transition-normal);
}

.service-card:hover {
  border-color: var(--accent-cyan);
  box-shadow: 0 15px 35px rgba(6, 182, 212, 0.15);
  transform: translateY(-5px);
}

.service-num {
  font-size: 2.5rem;
  font-weight: 900;
  color: rgba(255, 255, 255, 0.08);
  line-height: 1;
  margin-bottom: 1rem;
}

/* Research & Projects */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.project-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: rgba(245, 158, 11, 0.15);
  border: 1px solid rgba(245, 158, 11, 0.3);
  color: var(--accent-amber);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

/* Contact Section */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3.5rem;
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
  margin-top: 2rem;
}

.contact-info-item {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.contact-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--border-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-emerald);
  font-size: 1.25rem;
  flex-shrink: 0;
}

.contact-details h4 {
  font-size: 0.98rem;
  font-weight: 700;
  margin-bottom: 0.2rem;
}

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

.form-group {
  margin-bottom: 1.4rem;
}

.form-label {
  display: block;
  color: var(--text-main);
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.form-input, .form-textarea, .form-select {
  width: 100%;
  padding: 0.85rem 1.1rem;
  background: rgba(8, 12, 20, 0.6);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  color: #fff;
  font-family: var(--font-family);
  font-size: 0.95rem;
  transition: var(--transition-fast);
}

.form-input:focus, .form-textarea:focus, .form-select:focus {
  outline: none;
  border-color: var(--accent-emerald);
  box-shadow: 0 0 15px rgba(16, 185, 129, 0.2);
}

.form-select option {
  background: var(--bg-secondary);
  color: #fff;
}

/* Toast notification */
.toast-msg {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 2000;
  background: rgba(16, 185, 129, 0.95);
  color: #fff;
  padding: 1rem 1.6rem;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-weight: 600;
  transform: translateY(100px);
  opacity: 0;
  transition: var(--transition-normal);
  max-width: 90%;
}

html[dir="ltr"] .toast-msg {
  right: auto;
  left: 2rem;
}

.toast-msg.show {
  transform: translateY(0);
  opacity: 1;
}

/* Footer */
footer {
  background: #04060a;
  border-top: 1px solid var(--border-glass);
  padding: 3.5rem 0 2rem 0;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.9rem;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.4rem;
  margin-bottom: 2.2rem;
}

.footer-socials {
  display: flex;
  gap: 1.2rem;
}

.social-link {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition-fast);
}

.social-link:hover {
  background: var(--accent-emerald);
  color: #fff;
  transform: translateY(-3px);
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .mobile-menu-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    top: 70px;
    right: 0;
    left: 0;
    background: rgba(8, 12, 20, 0.96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 2rem 1.5rem;
    gap: 1.4rem;
    border-bottom: 1px solid var(--border-glass);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
    transform: translateY(-150%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

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

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

  .workshop-info-panel {
    border-right: none;
    border-left: none;
    border-top: 1px solid var(--border-glass);
  }

  .control-hint-box {
    display: none;
  }
}

@media (max-width: 640px) {
  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }

  .btn-primary, .btn-glass {
    width: 100%;
    justify-content: center;
  }

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

  .toast-msg {
    right: 5%;
    bottom: 1rem;
  }

  .section {
    padding: 4.5rem 0;
  }
}