/* ============================================
   秋末 — Personal Developer Website
   Modern, Premium Visual Design
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  /* Colors */
  --bg-primary: #09090b;
  --bg-secondary: #0f0f12;
  --bg-tertiary: #16161a;
  --bg-card: #111114;
  --bg-card-hover: #1a1a1f;

  --text-primary: #f4f4f5;
  --text-secondary: #a1a1aa;
  --text-tertiary: #71717a;
  --text-muted: #52525b;

  --accent-blue: #6366f1;
  --accent-purple: #a855f7;
  --accent-cyan: #06b6d4;

  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
  --gradient-subtle: linear-gradient(135deg, rgba(99,102,241,0.15) 0%, rgba(168,85,247,0.15) 100%);
  --gradient-border: linear-gradient(135deg, rgba(99,102,241,0.5) 0%, rgba(168,85,247,0.5) 50%, rgba(236,72,153,0.5) 100%);

  --border-color: rgba(255,255,255,0.06);
  --border-color-hover: rgba(255,255,255,0.12);

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 60px rgba(99,102,241,0.15);
  --shadow-glow-strong: 0 0 80px rgba(99,102,241,0.25);

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Arial Unicode MS", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Spacing */
  --section-gap: 120px;
  --container-max: 1200px;
  --nav-height: 72px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

::selection {
  background: rgba(99,102,241,0.3);
  color: var(--text-primary);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

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

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
  color: inherit;
}

input, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* --- Cursor Glow --- */
.cursor-glow {
  position: fixed;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99,102,241,0.07) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s ease;
  opacity: 0;
}

.cursor-glow.active {
  opacity: 1;
}

/* --- Container --- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Text Gradient --- */
.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- Section Label --- */
.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-blue);
  margin-bottom: 16px;
  font-family: var(--font-mono);
}

/* --- Section Title --- */
.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 16px;
}

/* --- Section Desc --- */
.section-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.7;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-full);
  font-size: 0.925rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: all 0.35s var(--ease-out);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 4px 24px rgba(99,102,241,0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(99,102,241,0.45);
}

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

.btn-ghost {
  border: 1px solid var(--border-color-hover);
  color: var(--text-secondary);
  backdrop-filter: blur(12px);
}

.btn-ghost:hover {
  border-color: rgba(255,255,255,0.25);
  color: var(--text-primary);
  background: rgba(255,255,255,0.05);
  transform: translateY(-2px);
}

/* Ripple effect */
.btn .ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.25);
  transform: scale(0);
  animation: ripple-anim 0.6s ease-out forwards;
  pointer-events: none;
}

@keyframes ripple-anim {
  to { transform: scale(4); opacity: 0; }
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  transition: all 0.4s var(--ease-out);
}

.nav.scrolled {
  background: rgba(9,9,11,0.82);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-color);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.logo-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: inline-block;
  animation: logo-pulse 2s ease-in-out infinite;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-tertiary);
  border-radius: var(--radius-full);
  transition: all 0.3s var(--ease-out);
  position: relative;
}

.nav-link:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.05);
}

.nav-link.active {
  color: var(--text-primary);
  background: rgba(99,102,241,0.12);
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  z-index: 1001;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s var(--ease-out);
  transform-origin: center;
}

.nav-toggle.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav-toggle.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(9,9,11,0.96);
  backdrop-filter: blur(24px);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s var(--ease-out);
}

.mobile-menu.open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-menu-links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.mobile-link {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-tertiary);
  transition: all 0.3s var(--ease-out);
  transform: translateY(20px);
  opacity: 0;
}

.mobile-menu.open .mobile-link {
  transform: translateY(0);
  opacity: 1;
}

.mobile-menu.open .mobile-link:nth-child(1) { transition-delay: 0.1s; }
.mobile-menu.open .mobile-link:nth-child(2) { transition-delay: 0.15s; }
.mobile-menu.open .mobile-link:nth-child(3) { transition-delay: 0.2s; }
.mobile-menu.open .mobile-link:nth-child(4) { transition-delay: 0.25s; }

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

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero-gradient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.4;
  pointer-events: none;
  z-index: 0;
}

.hero-orb-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(99,102,241,0.4), transparent 70%);
  top: -10%;
  right: -5%;
  animation: orb-float-1 12s ease-in-out infinite;
}

.hero-orb-2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(168,85,247,0.35), transparent 70%);
  bottom: -10%;
  left: -5%;
  animation: orb-float-2 15s ease-in-out infinite;
}

.hero-orb-3 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(236,72,153,0.25), transparent 70%);
  top: 40%;
  left: 50%;
  animation: orb-float-3 10s ease-in-out infinite;
}

@keyframes orb-float-1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(-40px, 30px) scale(1.05); }
  66% { transform: translate(20px, -20px) scale(0.95); }
}

@keyframes orb-float-2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -40px) scale(1.08); }
  66% { transform: translate(-20px, 20px) scale(0.92); }
}

@keyframes orb-float-3 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-30px, 30px) scale(1.1); }
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 0 24px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  background: rgba(255,255,255,0.03);
  backdrop-filter: blur(12px);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #22c55e;
  animation: badge-pulse 2s ease-in-out infinite;
}

@keyframes badge-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(34,197,94,0.4); }
  50% { box-shadow: 0 0 0 6px rgba(34,197,94,0); }
}

.hero-title {
  margin-bottom: 16px;
}

.hero-name {
  font-size: clamp(3.5rem, 12vw, 8rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.05;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

.hero-role-wrapper {
  font-size: clamp(1rem, 2.5vw, 1.35rem);
  color: var(--text-secondary);
  margin-bottom: 24px;
  font-weight: 400;
  height: 2em;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
}

.hero-role {
  color: var(--text-primary);
  font-weight: 600;
  min-width: 200px;
  text-align: left;
}

.hero-role-cursor {
  display: inline-block;
  color: var(--accent-blue);
  font-weight: 300;
  animation: cursor-blink 1s ease-in-out infinite;
}

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

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-tertiary);
  max-width: 480px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 64px;
}

.hero-scroll-hint {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-weight: 500;
  animation: scroll-hint-float 2.5s ease-in-out infinite;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--text-muted), transparent);
}

@keyframes scroll-hint-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}

/* ============================================
   SECTION BASE
   ============================================ */
.section {
  padding: var(--section-gap) 0;
  position: relative;
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 80px;
  align-items: start;
  margin-top: 48px;
}

.about-avatar-wrapper {
  position: relative;
  display: flex;
  justify-content: center;
}

.about-avatar {
  position: relative;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.avatar-placeholder {
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
}

.avatar-ring {
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  border: 2px solid transparent;
  background: var(--gradient-border);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  padding: 2px;
  animation: ring-spin 8s linear infinite;
}

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

.about-avatar-glow {
  position: absolute;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99,102,241,0.15), transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: -1;
}

.about-title {
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  line-height: 1.2;
}

.about-text p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 16px;
}

.about-stats {
  display: flex;
  gap: 40px;
  margin-top: 36px;
  padding-top: 32px;
  border-top: 1px solid var(--border-color);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-number::after {
  content: '+';
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* ============================================
   PROJECTS SECTION
   ============================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.project-card {
  perspective: 1000px;
  cursor: pointer;
}

.project-card-inner {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  min-height: 340px;
  display: flex;
  flex-direction: column;
  transition: all 0.5s var(--ease-out);
  overflow: hidden;
  transform-style: preserve-3d;
}

.project-card-inner:hover {
  border-color: transparent;
  transform: translateY(-8px);
  box-shadow: var(--shadow-glow-strong);
}

.project-card-bg {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.5s var(--ease-out);
  border-radius: var(--radius-lg);
}

.project-card[data-project="1"] .project-card-bg {
  background: radial-gradient(circle at 30% 30%, rgba(99,102,241,0.12) 0%, transparent 70%);
}

.project-card[data-project="2"] .project-card-bg {
  background: radial-gradient(circle at 30% 30%, rgba(168,85,247,0.12) 0%, transparent 70%);
}

.project-card[data-project="3"] .project-card-bg {
  background: radial-gradient(circle at 30% 30%, rgba(236,72,153,0.12) 0%, transparent 70%);
}

.project-card-inner:hover .project-card-bg {
  opacity: 1;
}

.project-card-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.project-number {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 16px;
}

.project-title {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.project-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 20px;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.tag {
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-full);
  background: rgba(99,102,241,0.1);
  color: var(--accent-blue);
  border: 1px solid rgba(99,102,241,0.15);
}

.project-view-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all 0.3s var(--ease-out);
}

.project-view-btn:hover {
  color: var(--text-primary);
  gap: 10px;
}

.project-card-border {
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-lg);
  padding: 1px;
  background: var(--gradient-border);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.5s var(--ease-out);
}

.project-card-inner:hover .project-card-border {
  opacity: 1;
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  margin-top: 48px;
  align-items: start;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact-link-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  transition: all 0.35s var(--ease-out);
}

.contact-link-item:hover {
  border-color: var(--border-color-hover);
  background: rgba(255,255,255,0.03);
  transform: translateX(4px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

.contact-link-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--gradient-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--accent-blue);
}

.contact-link-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-tertiary);
  font-weight: 500;
  margin-bottom: 2px;
}

.contact-link-value {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* Contact Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  position: relative;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: all 0.35s var(--ease-out);
  outline: none;
}

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

.form-group label {
  position: absolute;
  top: 16px;
  left: 20px;
  font-size: 0.95rem;
  color: var(--text-tertiary);
  pointer-events: none;
  transition: all 0.25s var(--ease-out);
  transform-origin: left;
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
  top: -10px;
  left: 16px;
  font-size: 0.75rem;
  color: var(--accent-blue);
  background: var(--bg-primary);
  padding: 0 6px;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.12), 0 0 30px rgba(99,102,241,0.08);
}

.form-glow {
  position: absolute;
  inset: -2px;
  border-radius: var(--radius-md);
  opacity: 0;
  transition: opacity 0.35s var(--ease-out);
  pointer-events: none;
  background: var(--gradient-primary);
  z-index: -1;
  filter: blur(8px);
}

.form-group input:focus ~ .form-glow,
.form-group textarea:focus ~ .form-glow {
  opacity: 0.12;
}

.btn-submit {
  width: 100%;
  justify-content: center;
  padding: 16px 28px;
}

.btn-loading,
.btn-success {
  display: none;
}

.btn-submit.loading .btn-text { display: none; }
.btn-submit.loading .btn-loading { display: inline-flex; }
.btn-submit.success .btn-text { display: none; }
.btn-submit.success .btn-loading { display: none; }
.btn-submit.success .btn-success { display: inline-flex; }
.btn-submit.success { background: #22c55e; }

.spinner {
  width: 20px;
  height: 20px;
  animation: spin 1s linear infinite;
}

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

/* ============================================
   FOOTER
   ============================================ */
.footer {
  padding: 40px 0;
  border-top: 1px solid var(--border-color);
}

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

.footer-text {
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

/* ============================================
   MODAL
   ============================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s var(--ease-out);
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  max-width: 680px;
  width: 100%;
  max-height: 80vh;
  overflow-y: auto;
  position: relative;
  transform: scale(0.92) translateY(20px);
  transition: transform 0.4s var(--ease-spring);
  scrollbar-width: thin;
  scrollbar-color: var(--text-muted) transparent;
}

.modal-overlay.open .modal {
  transform: scale(1) translateY(0);
}

.modal::-webkit-scrollbar {
  width: 6px;
}

.modal::-webkit-scrollbar-thumb {
  background: var(--text-muted);
  border-radius: 3px;
}

.modal-close {
  position: sticky;
  top: 16px;
  float: right;
  margin: 16px 16px 0 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transition: all 0.2s var(--ease-out);
  color: var(--text-secondary);
}

.modal-close:hover {
  background: rgba(255,255,255,0.12);
  color: var(--text-primary);
  transform: rotate(90deg);
}

.modal-content {
  padding: 40px;
}

.modal-content h2 {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.modal-content .modal-subtitle {
  color: var(--text-tertiary);
  font-size: 0.9rem;
  margin-bottom: 24px;
}

.modal-content .modal-image {
  width: 100%;
  height: 240px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  overflow: hidden;
}

.modal-content .modal-desc {
  color: var(--text-secondary);
  line-height: 1.8;
  font-size: 0.95rem;
  margin-bottom: 24px;
}

.modal-content .modal-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.modal-content .modal-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  color: #fff;
  font-weight: 600;
  font-size: 0.875rem;
  transition: all 0.3s var(--ease-out);
}

.modal-content .modal-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(99,102,241,0.35);
}

/* ============================================
   TOAST
   ============================================ */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 3000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(12px);
  transform: translateX(120%);
  transition: transform 0.4s var(--ease-spring);
  max-width: 360px;
}

.toast.show {
  transform: translateX(0);
}

.toast-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.toast-icon.success {
  background: rgba(34,197,94,0.15);
  color: #22c55e;
}

.toast-icon.error {
  background: rgba(239,68,68,0.15);
  color: #ef4444;
}

.toast-text {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
}

.toast-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  animation: toast-progress 3s linear forwards;
}

@keyframes toast-progress {
  from { width: 100%; }
  to { width: 0%; }
}

/* ============================================
   SCROLL REVEAL ANIMATIONS
   ============================================ */
.reveal-up,
.reveal-left,
.reveal-right {
  opacity: 0;
  transition: all 0.8s var(--ease-out);
}

.reveal-up {
  transform: translateY(40px);
}

.reveal-left {
  transform: translateX(-40px);
}

.reveal-right {
  transform: translateX(40px);
}

.reveal-up.revealed,
.reveal-left.revealed,
.reveal-right.revealed {
  opacity: 1;
  transform: translate(0, 0);
}

/* Staggered children */
.reveal-up:nth-child(2) { transition-delay: 0.08s; }
.reveal-up:nth-child(3) { transition-delay: 0.16s; }
.reveal-up:nth-child(4) { transition-delay: 0.24s; }
.reveal-up:nth-child(5) { transition-delay: 0.32s; }

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Tablet */
@media (max-width: 1024px) {
  :root {
    --section-gap: 80px;
  }

  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-grid {
    gap: 48px;
  }
}

/* Tablet Small */
@media (max-width: 860px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .about-avatar-wrapper {
    justify-content: center;
  }

  .about-stats {
    justify-content: center;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}

/* Mobile */
@media (max-width: 768px) {
  :root {
    --section-gap: 64px;
    --nav-height: 64px;
  }

  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .hero-name {
    font-size: clamp(3rem, 15vw, 5rem);
  }

  .hero-actions {
    flex-direction: column;
    gap: 12px;
  }

  .hero-actions .btn {
    width: 100%;
    max-width: 260px;
    justify-content: center;
  }

  .projects-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .project-card-inner {
    min-height: auto;
    padding: 24px;
  }

  .modal-content {
    padding: 24px;
  }

  .modal {
    max-height: 90vh;
  }

  .about-avatar {
    width: 180px;
    height: 180px;
  }

  .about-avatar-glow {
    width: 200px;
    height: 200px;
  }

  .about-stats {
    gap: 24px;
    flex-wrap: wrap;
    justify-content: center;
  }

  .cursor-glow {
    display: none;
  }

  .toast-container {
    left: 16px;
    right: 16px;
    bottom: 16px;
  }

  .toast {
    max-width: 100%;
  }
}

/* Mobile Small */
@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero-name {
    font-size: clamp(2.5rem, 18vw, 4rem);
  }

  .hero-desc {
    font-size: 0.95rem;
  }

  .section-title {
    font-size: clamp(1.5rem, 7vw, 2rem);
  }

  .contact-link-item {
    padding: 12px 16px;
  }
}

/* ============================================
   CUSTOM SCROLLBAR
   ============================================ */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--text-muted);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-tertiary);
}

/* ============================================
   PERFORMANCE
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}