/* ═══════════════════════════════════════════════════════════════════════════
   PORTFOLIO — style.css
   Fonts: Syne (display) + Space Mono (code/mono)
   Design: Dark-first, electric-cyan accent, glassmorphism
   ═══════════════════════════════════════════════════════════════════════════ */

/* ─── CSS Custom Properties (Themes) ────────────────────────────────────── */
:root {
  --accent:     #29aa9b;
  --accent-dim: #00ffe033;
  --accent-mid: #00ffe088;
  --speed: 40s;

  /* Dark Theme (default) */
  --bg:           #080c12;
  --bg-surface:   #0e1420;
  --bg-glass:     rgba(14, 20, 32, 0.6);
  --border:       rgba(0, 255, 224, 0.12);
  --text:         #e8edf5;
  --text-muted:   #6b7a99;
  --text-inv:     #080c12;
  --shadow:       0 8px 40px rgba(0,0,0,0.6);
  --glow:         0 0 40px rgba(0, 255, 224, 0.15);
  --nav-bg:       rgba(8, 12, 18, 0.85);

  /* Typography */
  --font-display: 'Syne', sans-serif;
  --font-mono:    'Space Mono', monospace;

  /* Spacing */
  --section-pad:  clamp(5rem, 10vw, 9rem);
  --container:    1200px;

  /* Transitions */
  --t-fast:   0.15s ease;
  --t-base:   0.3s ease;
  --t-slow:   0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="light"] {
  --bg:         #f4f6fb;
  --bg-surface: #ffffff;
  --bg-glass:   rgba(255,255,255,0.7);
  --border:     rgba(0, 180, 160, 0.18);
  --text:       #0d1117;
  --text-muted: #5a6480;
  --text-inv:   #f4f6fb;
  --shadow:     0 8px 40px rgba(0,0,0,0.1);
  --glow:       0 0 40px rgba(0, 200, 180, 0.1);
  --nav-bg:     rgba(244, 246, 251, 0.9);
}

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

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

body {
  font-family: var(--font-display);
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  transition: background var(--t-base), color var(--t-base);
  cursor: none;
}

@media (pointer: coarse) { body { cursor: auto; } }

::selection { background: var(--accent-dim); color: var(--accent); }

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul { list-style: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }

/* ─── Custom Cursor ──────────────────────────────────────────────────────── */
.cursor, .cursor-follower {
  position: fixed;
  top: 0; left: 0;
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  transition: opacity var(--t-fast);
}

.cursor {
  width: 8px; height: 8px;
  background: var(--accent);
  transform: translate(-50%, -50%);
}

.cursor-follower {
  width: 36px; height: 36px;
  border: 1.5px solid var(--accent-mid);
  transform: translate(-50%, -50%);
  transition: transform 0.12s ease, width var(--t-fast), height var(--t-fast), border-color var(--t-fast);
}

body.cursor-hover .cursor-follower {
  width: 56px; height: 56px;
  border-color: var(--accent);
  background: var(--accent-dim);
}

/* ─── Container ─────────────────────────────────────────────────────────── */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 clamp(1.2rem, 5vw, 3rem);
}

/* ─── Navbar ─────────────────────────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem clamp(1.2rem, 5vw, 3rem);
  background: var(--nav-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  transition: background var(--t-base), padding var(--t-base);
}

.navbar.scrolled { padding: 0.8rem clamp(1.2rem, 5vw, 3rem); }

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text);
  transition: color var(--t-fast);
}

.logo-bracket { color: var(--accent); }

.nav-links {
  display: flex;
  gap: 2.5rem;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  position: relative;
  padding-bottom: 3px;
  transition: color var(--t-base);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width var(--t-slow);
}

.nav-link:hover { color: var(--text); }
.nav-link:hover::after { width: 100%; }

/* Theme toggle */
.theme-toggle {
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: var(--bg-surface);
  transition: border-color var(--t-base), transform var(--t-fast);
}

.theme-toggle:hover { transform: rotate(20deg); border-color: var(--accent); }

.toggle-icon {
  position: absolute;
  font-size: 1rem;
  transition: transform var(--t-base), opacity var(--t-base);
}

[data-theme="dark"] .sun  { transform: translateY(40px); opacity: 0; }
[data-theme="dark"] .moon { transform: translateY(0); opacity: 1; color: #f4f6fb;}
[data-theme="light"] .sun  { transform: translateY(0); opacity: 1; }
[data-theme="light"] .moon { transform: translateY(-40px); opacity: 0; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--t-base), opacity var(--t-fast);
}

.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav */
.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 999;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
  transform: translateX(100%);
  transition: transform var(--t-slow);
}

.mobile-nav.open { transform: translateX(0); }

.mobile-nav-link {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-muted);
  transition: color var(--t-base);
}

.mobile-nav-link:hover { color: var(--accent); }

/* ─── Hero ───────────────────────────────────────────────────────────────── */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  overflow: hidden;
  user-select: none; 
  -webkit-user-select: none;
}

#heroCanvas {
  position: absolute;
  inset: 0;
  width: 100% !important;
  height: 100% !important;
  display: block;
  z-index: 1;
  pointer-events: auto; 
  touch-action: pan-y;  
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 680px;
  padding: 0 clamp(1.2rem, 5vw, 3rem);
  margin-left: clamp(1.2rem, 8vw, 8rem);
  pointer-events: none; 
}

.hero-tag {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: clamp(3rem, 7vw, 6rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.hero-line { display: block; }
.hero-line.accent { color: var(--accent); }

.hero-sub {
  font-size: clamp(0.95rem, 1.8vw, 1.1rem);
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 2.5rem;
  max-width: 480px;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  pointer-events: auto;
}

.hero-cta a,
.hero-cta .btn {
  pointer-events: auto;
  cursor: pointer;
}

/* Scroll indicator */
.scroll-hint {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  z-index: 2;
  opacity: 0.5;
  pointer-events: none;
}

.scroll-line {
  display: block;
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, transparent, var(--accent));
  animation: scrollPulse 2s ease-in-out infinite;
}

.scroll-text {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

@keyframes scrollPulse {
  0%, 100% { transform: scaleY(1); opacity: 0.5; }
  50% { transform: scaleY(0.6); opacity: 1; }
}

@media (max-width: 768px) {
  .hero {
    align-items: flex-end;
    padding-bottom: 6.5rem;
  }
  .hero-content {
    margin-left: 0;
  }
}

/* ─── Buttons ────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 2rem;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: transform var(--t-fast), box-shadow var(--t-base), background var(--t-base);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent);
  transform: translateX(-101%);
  transition: transform var(--t-slow);
  z-index: 0;
}

.btn > * { position: relative; z-index: 1; }

.btn:hover { transform: translateY(-2px); }
.btn:hover::before { transform: translateX(0); }

.btn-primary {
  background: var(--accent);
  color: var(--text-inv);
  box-shadow: 0 0 20px var(--accent-dim);
}

.btn-primary:hover {
  box-shadow: 0 0 30px var(--accent-mid);
  color: var(--text-inv);
}

.btn-ghost {
  border: 1px solid var(--border);
  color: var(--text);
}

.btn-ghost:hover { color: var(--text-inv); }

.btn-send {
  margin-top: 0.5rem;
  min-width: 200px;
  justify-content: center;
}

/* ─── Sections — Shared ──────────────────────────────────────────────────── */
.section { padding: var(--section-pad) 0; }

.section-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 1.2rem;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 3rem;
}

.dot { display: inline-block; }

/* ─── Glass utility ──────────────────────────────────────────────────────── */
.glass {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: 12px;
}

/* ─── About ──────────────────────────────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 4rem;
  align-items: center;
}

.about-text p {
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 1.2rem;
  font-size: 1.05rem;
}

.about-stats {
  display: flex;
  gap: 2.5rem;
  margin-top: 2.5rem;
}

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

.stat-num {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  font-family: var(--font-mono);
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  margin-top: 0.3rem;
  font-family: var(--font-mono);
}

.about-card {
  padding: 2.5rem 2rem;
  text-align: center;
  transition: box-shadow var(--t-base);
}

.about-card:hover { box-shadow: var(--glow); }

.avatar-placeholder {
  width: 90px; height: 90px;
  border-radius: 50%;
  background: var(--accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  position: relative;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  font-family: var(--font-mono);
}

.avatar-ring {
  position: absolute;
  inset: -5px;
  border-radius: 50%;
  border: 1.5px solid var(--accent-mid);
  animation: ringPulse 3s ease-in-out infinite;
}

@keyframes ringPulse {
  0%, 100% { transform: scale(1); opacity: 0.6; }
  50% { transform: scale(1.08); opacity: 1; }
}

.about-name {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
}

.about-role {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.about-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
}

.badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.25rem 0.75rem;
  border-radius: 100px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  background: var(--accent-dim);
  color: var(--accent);
  letter-spacing: 0.05em;
}

/* ─── Projects ───────────────────────────────────────────────────────────── */
.projects { background: var(--bg-surface); }

#projectsGrid:not(.show-all) .project-card:nth-child(n+5) {
    display: none;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 480px), 1fr));
  gap: 1.5rem;
}

.project-card {
  position: relative;
  border-radius: 12px;
  transition: transform var(--t-slow);
  outline: none;
}

.project-card:hover, .project-card:focus-visible {
  transform: translateY(-6px);
}

.card-inner {
  padding: 2rem;
  height: 100%;
  transition: box-shadow var(--t-base);
  position: relative;
  z-index: 1;
  border-radius: 12px;
}

.project-card:hover .card-inner, .project-card:focus-visible .card-inner {
  box-shadow: var(--glow);
  border-color: var(--accent-mid);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.card-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.1em;
}

.card-links { display: flex; gap: 1rem; }

.card-link {
  font-size: 1rem;
  color: var(--text-muted);
  transition: color var(--t-fast), transform var(--t-fast);
  display: inline-block;
}

.card-link:hover { color: var(--accent); transform: translateY(-2px); }

.card-title {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.card-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

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

.card-tags span {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--accent);
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--accent-dim);
  border-radius: 3px;
  letter-spacing: 0.05em;
}

/* Glow layer */
.card-glow {
  position: absolute;
  inset: 0;
  border-radius: 12px;
  opacity: 0;
  background: radial-gradient(circle at center, var(--accent-dim) 0%, transparent 70%);
  transition: opacity var(--t-base);
  pointer-events: none;
}

.project-card:hover .card-glow,
.project-card:focus-visible .card-glow { opacity: 1; }

/* ─── Skills ─────────────────────────────────────────────────────────────── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
  gap: 3rem;
}

.skill-group-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.skill-list { display: flex; flex-direction: column; gap: 1.2rem; }

.skill-item {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.skill-name {
  font-size: 0.88rem;
  font-family: var(--font-mono);
  color: var(--text);
}

.skill-bar {
  height: 3px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}

.skill-fill {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(to right, var(--accent-mid), var(--accent));
  border-radius: 2px;
  transition: width 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ─── Contact ────────────────────────────────────────────────────────────── */
.contact { background: var(--bg-surface); }

.contact-sub {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 3rem;
  margin-top: -1.5rem;
}

.contact-form { max-width: 720px; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  position: relative;
}

.form-group label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.form-group input,
.form-group textarea {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-display);
  font-size: 1rem;
  padding: 0.6rem 0;
  outline: none;
  transition: border-color var(--t-base);
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus { border-color: var(--accent); }

/* Animated underline */
.form-line {
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width var(--t-slow);
}

.form-group:focus-within .form-line { width: 100%; }

.form-success {
  display: none;
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  padding: 0.75rem 1rem;
  border: 1px solid var(--accent-dim);
  border-radius: 4px;
  background: var(--accent-dim);
}

.form-success.visible { display: block; animation: fadeIn 0.4s ease; }

.social-links {
  display: flex;
  gap: 2rem;
  margin-top: 4rem;
  flex-wrap: wrap;
}

.social-link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  position: relative;
  padding-bottom: 3px;
  transition: color var(--t-base);
}

.social-link::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width var(--t-slow);
}

.social-link:hover { color: var(--accent); }
.social-link:hover::after { width: 100%; }

/* ─── Footer ─────────────────────────────────────────────────────────────── */
.footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
}

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

.footer p {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.back-top {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  transition: color var(--t-fast), transform var(--t-fast);
  display: inline-block;
}

.back-top:hover { color: var(--accent); transform: translateY(-2px); }

/* ─── Accent Color ───────────────────────────────────────────────────────── */
.accent { color: var(--accent); }

/* ─── Scroll Reveal Animations ───────────────────────────────────────────── */
.reveal-item {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-item.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered delays */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }

/* ─── Misc Animations ────────────────────────────────────────────────────── */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-visual { order: -1; max-width: 320px; }
  .nav-links { display: none; }
  .hamburger { display: flex; }
}

@media (max-width: 640px) {
  .form-row { grid-template-columns: 1fr; }
  .hero-content { margin-left: 0; }
  .about-stats { gap: 1.5rem; }
  .social-links { gap: 1.2rem; }
  .footer .container { flex-direction: column; gap: 1rem; }
}

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

/* ─── Focus styles (accessibility) ──────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ═══════════════════════════════════════════════════════════════════════════
   DONATION SECTION
═══════════════════════════════════════════════════════════════════════════ */

.donate-section { background: var(--bg); }

.donate-sub {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 2.5rem;
  margin-top: -1.5rem;
}

.donate-sub strong { color: var(--accent); }

.donate-card {
  max-width: 600px;
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* Payment method icons */
.pay-methods {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.pay-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  background: var(--bg-surface);
  transition: border-color var(--t-base), color var(--t-base);
}

.pay-badge:hover { border-color: var(--accent); color: var(--text); }
.pay-icon { font-size: 1.1rem; }

/* Preset amount buttons */
.preset-amounts {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.amount-btn {
  padding: 0.7rem 1.4rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--t-base);
  position: relative;
  overflow: hidden;
}

.amount-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-dim);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-slow);
}

.amount-btn:hover, .amount-btn.active {
  border-color: var(--accent);
  color: var(--accent);
}

.amount-btn:hover::before, .amount-btn.active::before { transform: scaleX(1); }

/* Custom amount input */
.custom-amount-wrap { display: flex; flex-direction: column; gap: 0.6rem; }

.custom-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.custom-input-wrap {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.5rem;
  transition: border-color var(--t-base);
}

.custom-input-wrap:focus-within { border-color: var(--accent); }

.peso-sign {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--accent);
}

.custom-input {
  background: transparent;
  border: none;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 1.1rem;
  outline: none;
  width: 100%;
}

.custom-input::placeholder { color: var(--text-muted); }

/* Donate button */
.btn-donate {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 1rem 2rem;
  border-radius: 6px;
  background: var(--accent);
  color: var(--text-inv);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  cursor: pointer;
  border: none;
  transition: transform var(--t-fast), box-shadow var(--t-base), opacity var(--t-base);
  position: relative;
  overflow: hidden;
}

.btn-donate::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, transparent 60%);
  pointer-events: none;
}

.btn-donate:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--accent-mid);
}

.btn-donate:active { transform: translateY(0); }

.btn-donate:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.donate-arrow { transition: transform var(--t-base); }
.btn-donate:hover .donate-arrow { transform: translateX(4px); }

.donate-spinner {
  animation: spin 0.8s linear infinite;
  display: none;
}

.donate-spinner.spinning { display: inline-block; }

@keyframes spin { to { transform: rotate(360deg); } }

.donate-note {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  text-align: center;
  letter-spacing: 0.04em;
  margin-top: -0.5rem;
}

/* Payment result banners */
.payment-banner {
  margin-top: 1.5rem;
  max-width: 600px;
  padding: 1.2rem 1.5rem;
  border-radius: 10px;
  display: flex;
  align-items: center;
  gap: 1rem;
  animation: fadeIn 0.4s ease;
  font-size: 0.92rem;
}

.payment-banner span:first-child { font-size: 2rem; flex-shrink: 0; }
.payment-banner strong { display: block; margin-bottom: 0.2rem; }
.payment-banner p { color: var(--text-muted); font-size: 0.85rem; }

.payment-banner.success {
  background: rgba(0, 255, 150, 0.08);
  border: 1px solid rgba(0, 255, 150, 0.25);
  color: #00ff96;
}

.payment-banner.cancel {
  background: rgba(255, 100, 80, 0.08);
  border: 1px solid rgba(255, 100, 80, 0.25);
  color: var(--text);
}

/* ═══════════════════════════════════════════════════════════════════════════
   AI CHATBOT
═══════════════════════════════════════════════════════════════════════════ */

/* ── Floating trigger button ─────────────────────────────────────────────── */
.chat-trigger {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 1100;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--text-inv);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px var(--accent-mid);
  transition: transform var(--t-base), box-shadow var(--t-base);
  overflow: visible;
}

.chat-trigger:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 30px var(--accent-mid);
}

.chat-trigger-icon {
  position: absolute;
  transition: opacity var(--t-base), transform var(--t-base);
  display: flex;
  align-items: center;
  justify-content: center;
}

.chat-trigger-icon.open-icon  { opacity: 1; transform: scale(1) rotate(0deg); }
.chat-trigger-icon.close-icon { opacity: 0; transform: scale(0) rotate(-90deg); }

.chat-trigger.active .open-icon  { opacity: 0; transform: scale(0) rotate(90deg); }
.chat-trigger.active .close-icon { opacity: 1; transform: scale(1) rotate(0deg); }

/* Pulse ring */
.chat-pulse {
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  animation: chatPulse 2.5s ease-in-out infinite;
  pointer-events: none;
}

@keyframes chatPulse {
  0%, 100% { transform: scale(1); opacity: 0.7; }
  50% { transform: scale(1.18); opacity: 0; }
}

/* ── Chat window ─────────────────────────────────────────────────────────── */
.chat-window {
  position: fixed;
  bottom: 6.5rem;
  right: 2rem;
  z-index: 1099;
  width: clamp(300px, 90vw, 400px);
  height: clamp(400px, 70vh, 580px);
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  overflow: hidden;

  /* Hidden state */
  opacity: 0;
  transform: translateY(20px) scale(0.96);
  pointer-events: none;
  transform-origin: bottom right;
  transition: opacity var(--t-slow), transform var(--t-slow);
}

.chat-window.open {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: all;
}

/* Header */
.chat-header {
  padding: 1rem 1.2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  background: var(--bg-surface);
  flex-shrink: 0;
}

.chat-header-info { display: flex; align-items: center; gap: 0.9rem; }

.chat-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-dim), var(--accent-mid));
  border: 1.5px solid var(--accent-mid);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent);
  position: relative;
  flex-shrink: 0;
}

.chat-online-dot {
  position: absolute;
  bottom: 1px;
  right: 1px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #22c55e;
  border: 2px solid var(--bg-surface);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 0 rgba(34,197,94,0.4); }
  50% { box-shadow: 0 0 0 4px rgba(34,197,94,0); }
}

.chat-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
}

.chat-status {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  margin-top: 1px;
}

.chat-clear {
  width: 30px;
  height: 30px;
  border-radius: 6px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  background: transparent;
  transition: color var(--t-fast), border-color var(--t-fast);
}

.chat-clear:hover { color: var(--accent); border-color: var(--accent); }

/* Messages area */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  scroll-behavior: smooth;
}

.chat-messages::-webkit-scrollbar { width: 4px; }
.chat-messages::-webkit-scrollbar-track { background: transparent; }
.chat-messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* Message bubbles */
.chat-msg {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  max-width: 85%;
  animation: msgSlideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.chat-msg.bot  { align-self: flex-start; }
.chat-msg.user { align-self: flex-end; align-items: flex-end; }

@keyframes msgSlideIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.msg-bubble {
  padding: 0.75rem 1rem;
  border-radius: 12px;
  font-size: 0.88rem;
  line-height: 1.55;
  word-break: break-word;
}

.chat-msg.bot .msg-bubble {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text);
  border-bottom-left-radius: 4px;
}

.chat-msg.user .msg-bubble {
  background: var(--accent);
  color: var(--text-inv);
  border-bottom-right-radius: 4px;
}

.msg-time {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-muted);
  padding: 0 0.25rem;
}

/* Suggestion chips */
.chat-suggestions {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-top: 0.25rem;
}

.chip {
  padding: 0.5rem 0.85rem;
  border-radius: 100px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  font-size: 0.78rem;
  font-family: var(--font-display);
  cursor: pointer;
  text-align: left;
  transition: all var(--t-base);
}

.chip:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
  transform: translateX(3px);
}

/* Typing indicator */
.chat-typing {
  padding: 0.6rem 1.2rem;
  display: none;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.chat-typing.visible { display: flex; }

.chat-typing span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-mid);
  animation: typingBounce 1.2s ease-in-out infinite;
}

.chat-typing span:nth-child(2) { animation-delay: 0.18s; }
.chat-typing span:nth-child(3) { animation-delay: 0.36s; }

@keyframes typingBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-6px); opacity: 1; }
}

/* Input area */
.chat-input-area {
  display: flex;
  align-items: flex-end;
  gap: 0.5rem;
  padding: 0.85rem;
  border-top: 1px solid var(--border);
  background: var(--bg-surface);
  flex-shrink: 0;
}

.chat-input {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem 0.9rem;
  color: var(--text);
  font-family: var(--font-display);
  font-size: 0.88rem;
  resize: none;
  outline: none;
  line-height: 1.5;
  max-height: 100px;
  transition: border-color var(--t-base);
  scrollbar-width: none;
}

.chat-input::-webkit-scrollbar { display: none; }
.chat-input:focus { border-color: var(--accent); }
.chat-input::placeholder { color: var(--text-muted); }

.chat-send {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--accent);
  color: var(--text-inv);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
  flex-shrink: 0;
  transition: transform var(--t-fast), opacity var(--t-base);
}

.chat-send:hover { transform: scale(1.08); }
.chat-send:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* Error bubble styling */
.msg-bubble.error {
  background: rgba(255,80,80,0.1);
  border-color: rgba(255,80,80,0.3);
  color: #ff8080;
}

/* ── Mobile adjustments ─────────────────────────────────────────────────── */
@media (max-width: 480px) {
  .chat-window {
    bottom: 0;
    right: 0;
    left: 0;
    width: 100%;
    height: 80vh;
    border-radius: 20px 20px 0 0;
    transform-origin: bottom center;
  }

  .chat-trigger {
    bottom: 1.5rem;
    right: 1.5rem;
  }

  .donate-card { padding: 1.5rem; }
  .preset-amounts { gap: 0.5rem; }
  .amount-btn { padding: 0.6rem 1rem; font-size: 0.82rem; }

  /* ── Hero Mobile Layout ── */
  .hero {
    align-items: stretch;
  }

  .hero-content {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    min-height: 100vh;
    min-height: 100dvh;
    padding-top: 5.5rem;
    padding-bottom: 5rem;
    box-sizing: border-box;
    pointer-events: none;
  }

  .hero-tag,
  .hero-title,
  .hero-sub,
  .hero-cta {
    pointer-events: auto;
  }

  .hero-tag {
    font-size: 0.75rem;
    margin-bottom: 0.35rem;
  }

  .hero-title {
    font-size: clamp(1.9rem, 9vw, 2.5rem);
    line-height: 1.05;
    margin-bottom: 0;
  }

  .hero-sub {
    margin-top: auto;
    margin-bottom: 1rem;
    font-size: 0.8rem;
    line-height: 1.4;
  }

  .hide-mobile {
    display: none;
  }
}

/* .hidden utility */
.hidden { display: none !important; }

/* ─── BANNER WRAPPER ─── */
  .banner-section {
    position: relative;
    width: 100%;
    overflow: hidden;
    padding: 2rem 0;
  }

  /* fade edges */
  .banner-section::before,
  .banner-section::after {
    content: '';
    position: absolute;
    top: 0; bottom: 0;
    width: 12vw;
    z-index: 2;
    pointer-events: none;
  }
  .banner-section::before { left: 0;  background: linear-gradient(to right,  var(--bg), transparent); }
  .banner-section::after  { right: 0; background: linear-gradient(to left,   var(--bg), transparent); }

  .track {
    display: flex;
    gap: 1.2rem;
    width: max-content;
    animation: scroll var(--speed) linear infinite;
  }

  /* Pause on hover */
  .banner-section:hover .track { animation-play-state: paused; }

  @keyframes scroll {
    from { transform: translateX(0); }
    to   { transform: translateX(-50%); }
  }

  /* ─── CARD ─── */
  .card {
    position: relative;
    width: 150px;
    height: 70px;
    border-radius: 4px;
    overflow: hidden;
    flex-shrink: 0;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }


  .card img {
    height: 100%;
    display: block;
    transition: transform 0.5s ease;
  }

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


/* ─── Certificate Slider ─────────────────────────────────────────────────── */
.certificate-slider-wrapper {
  display: flex;
  align-items: center;
  position: relative;
  width: 100%;
  max-width: 900px;
  margin: 40px auto;
}

/* The scrollable track */
.certificate-track {
  display: flex;
  overflow-x: auto;
  scroll-behavior: smooth;
  gap: 1.5rem;
  padding: 2rem 1rem;
  
  /* Hide scrollbars */
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.certificate-track::-webkit-scrollbar {
  display: none;
}

/* Base Card */
.cert-card {
  flex: 0 0 auto;
  width: 260px;
  position: relative;
  border-radius: 12px;
  transition: transform var(--t-slow);
  outline: none;
  background: transparent;
}

.cert-card:hover, 
.cert-card:focus-visible {
  transform: translateY(-6px);
}

/* Inner Card Layer */
.cert-inner {
  padding: 1.25rem;
  height: 100%;
  transition: box-shadow var(--t-base), border-color var(--t-base);
  position: relative;
  z-index: 1;
  border-radius: 12px;
  background: var(--bg-surface);
  border: 1px solid transparent;
  display: flex;
  flex-direction: column;
}

.cert-card:hover .cert-inner, 
.cert-card:focus-visible .cert-inner {
  box-shadow: var(--glow);
  border-color: var(--accent-mid);
}

/* Glow layer */
.cert-glow {
  position: absolute;
  inset: 0;
  border-radius: 12px;
  opacity: 0;
  background: radial-gradient(circle at center, var(--accent-dim) 0%, transparent 70%);
  transition: opacity var(--t-base);
  pointer-events: none;
}

.cert-card:hover .cert-glow,
.cert-card:focus-visible .cert-glow { 
  opacity: 1; 
}

/* Content Styling */
.cert-card img {
  width: 100%;
  height: 170px;
  object-fit: contain;
  border-radius: 4px;
  margin-bottom: 1.25rem;
  background-color: #ffffff;
  border: 1px solid var(--accent-dim);
  padding: 5px;
}

.cert-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
  color: inherit;
}

.cert-card p {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin: 0;
}

/* Navigation Arrows */
.slider-btn {
  background-color: var(--bg-surface);
  color: var(--accent);
  border: 1px solid var(--accent-dim);
  border-radius: 50%;
  width: 44px;
  height: 44px;
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  position: absolute;
  z-index: 10;
  transition: background-color var(--t-fast), color var(--t-fast), transform var(--t-fast);
}

.slider-btn:hover {
  background-color: var(--accent);
  color: var(--bg-surface);
  transform: scale(1.05);
}

.left-btn { left: -20px; }
.right-btn { right: -20px; }