/* ============================================
   CyberPersonal - Design System
   Inspired by Arknights (ak.hypergryph.com)
   ============================================ */

/* === CSS Custom Properties === */
:root {
  /* Background */
  --color-bg-primary:   #0a0e17;
  --color-bg-secondary: #0d111f;
  --color-bg-tertiary:  #1a1e2c;
  --color-bg-elevated:  #222639;

  /* Accent */
  --color-accent-cyan:  #00d4ff;
  --color-accent-orange:#ff6b35;
  --color-accent-blue:  #4a8fe7;

  /* Text */
  --color-text-primary:   #e8ecf1;
  --color-text-secondary: #8a92a6;
  --color-text-tertiary:  #4a5064;
  --color-text-inverse:   #0a0e17;

  /* Semantic */
  --color-success: #34d399;
  --color-warning: #fbbf24;
  --color-error:   #ef4444;
  --color-info:    #60a5fa;

  /* Gradients */
  --gradient-brand:     linear-gradient(135deg, #00d4ff, #4a8fe7);
  --gradient-accent:    linear-gradient(135deg, #ff6b35, #ff9a44);
  --gradient-bg-card:   linear-gradient(180deg, #0d111f, #1a1e2c);
  --gradient-glow-cyan: radial-gradient(ellipse at center, rgba(0,212,255,0.15), transparent 70%);

  /* Typography */
  --font-display: 'Orbitron', 'Noto Sans SC', sans-serif;
  --font-body:    'Noto Sans SC', 'JetBrains Mono', -apple-system, 'Microsoft YaHei', sans-serif;
  --font-mono:    'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;

  /* Spacing (8px grid) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;

  /* Shadows */
  --shadow-card:       0 2px 8px rgba(0,0,0,0.4), 0 0 1px rgba(0,212,255,0.1);
  --shadow-card-hover: 0 8px 32px rgba(0,0,0,0.6), 0 0 12px rgba(0,212,255,0.15);
  --shadow-modal:      0 24px 64px rgba(0,0,0,0.8), 0 0 24px rgba(0,212,255,0.1);
  --shadow-glow-cyan:  0 0 20px rgba(0,212,255,0.4), 0 0 40px rgba(0,212,255,0.1);
  --shadow-glow-orange:0 0 20px rgba(255,107,53,0.4), 0 0 40px rgba(255,107,53,0.1);
  --shadow-nav:        0 4px 30px rgba(0,0,0,0.5);

  /* Radius */
  --radius-none: 0;
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   12px;
  --radius-xl:   16px;
  --radius-full: 9999px;

  /* Easing */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out:      cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring:   cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Layout */
  --nav-height: 72px;
  --max-width: 1400px;
}

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

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

body {
  font-family: var(--font-body);
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-accent-cyan);
  text-decoration: none;
  transition: color 0.3s var(--ease-out);
}
a:hover {
  color: var(--color-text-primary);
}

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

ul, ol {
  list-style: none;
}

/* === Typography === */
h1, .h1 { font-family: var(--font-display); font-weight: 700; font-size: clamp(2rem, 5vw, 3.5rem); line-height: 1.2; letter-spacing: 0.02em; }
h2, .h2 { font-family: var(--font-body); font-weight: 600; font-size: clamp(1.75rem, 3.5vw, 2.5rem); line-height: 1.3; }
h3, .h3 { font-family: var(--font-body); font-weight: 600; font-size: clamp(1.25rem, 2.5vw, 1.75rem); line-height: 1.3; }
h4, .h4 { font-family: var(--font-body); font-weight: 500; font-size: clamp(1.1rem, 2vw, 1.5rem); line-height: 1.4; }

code, .font-mono {
  font-family: var(--font-mono);
}

.text-accent-cyan { color: var(--color-accent-cyan); }
.text-accent-orange { color: var(--color-accent-orange); }
.text-secondary { color: var(--color-text-secondary); }
.text-caption { font-size: 0.75rem; color: var(--color-text-tertiary); font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.1em; }

.label {
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-secondary);
}

/* === Container === */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
}
@media (min-width: 768px) {
  .container { padding: 0 40px; }
}
@media (min-width: 1024px) {
  .container { padding: 0 80px; }
}

/* === Section === */
.section {
  padding: var(--space-9) 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-8);
}

.section-header .label {
  display: block;
  margin-bottom: var(--space-3);
  color: var(--color-accent-cyan);
}

.section-header h2 {
  margin-bottom: var(--space-4);
}

.section-header p {
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
  font-size: 1.125rem;
}

/* === Page Loading Screen === */
.page-loading {
  position: fixed;
  inset: 0;
  background: var(--color-bg-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 99999;
  transition: opacity 0.6s var(--ease-out-expo);
}
.page-loading.hidden {
  opacity: 0;
  pointer-events: none;
}

.loading-terminal {
  text-align: left;
  max-width: 480px;
  width: 90%;
}

.loading-line {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-accent-cyan);
  margin-bottom: var(--space-2);
  opacity: 0;
  overflow: hidden;
  white-space: nowrap;
  border-right: 2px solid transparent;
}
.loading-line.typing {
  animation: typing 1.5s steps(40) forwards, blink-caret 0.8s step-end 3;
}
.loading-line.done {
  opacity: 0.6;
  border-right-color: transparent;
}

@keyframes typing {
  from { width: 0; opacity: 1; }
  to { width: 100%; opacity: 1; }
}
@keyframes blink-caret {
  50% { border-right-color: var(--color-accent-cyan); }
}

.loading-progress {
  margin-top: var(--space-6);
  width: 100%;
}

.loading-progress-bar {
  width: 100%;
  height: 3px;
  background: rgba(0, 212, 255, 0.1);
  border-radius: 2px;
  overflow: hidden;
  position: relative;
}
.loading-progress-bar::after {
  content: '';
  position: absolute;
  top: 0;
  left: -30%;
  width: 30%;
  height: 100%;
  background: var(--gradient-brand);
  border-radius: 2px;
  animation: loading-slide 1.5s ease-in-out infinite;
}
@keyframes loading-slide {
  0% { transform: translateX(0); }
  100% { transform: translateX(430%); }
}

.loading-progress-text {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
  margin-top: var(--space-2);
  text-align: right;
  letter-spacing: 0.1em;
}

.loading-brand {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
  margin-top: var(--space-8);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.6;
}

.loading-percentage {
  font-family: var(--font-display);
  font-size: 2.5rem;
  color: var(--color-accent-cyan);
  margin-bottom: var(--space-4);
  text-shadow: 0 0 20px rgba(0,212,255,0.3);
}

/* === Navigation === */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-4);
  z-index: 1000;
  transition: all 0.4s var(--ease-out);
}
@media (min-width: 768px) {
  .nav { padding: 0 40px; }
}
@media (min-width: 1024px) {
  .nav { padding: 0 80px; }
}

.nav.scrolled {
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: var(--shadow-nav);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-text-primary);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.nav-brand .brand-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent-cyan);
  box-shadow: 0 0 8px rgba(0,212,255,0.5);
  animation: dot-pulse 2s ease-in-out infinite;
}
@keyframes dot-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.nav-links {
  display: none;
  gap: var(--space-1);
}
@media (min-width: 768px) {
  .nav-links { display: flex; }
}

.nav-link {
  position: relative;
  padding: var(--space-2) var(--space-4);
  font-size: 0.8125rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-secondary);
  transition: color 0.3s var(--ease-out);
}
.nav-link:hover,
.nav-link.active {
  color: var(--color-accent-cyan);
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--color-accent-cyan);
  transition: all 0.3s var(--ease-out);
  transform: translateX(-50%);
}
.nav-link:hover::after,
.nav-link.active::after {
  width: 70%;
}

.nav-mobile-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--space-2);
  background: none;
  border: none;
}
@media (min-width: 768px) {
  .nav-mobile-toggle { display: none; }
}

.nav-mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  transition: all 0.3s var(--ease-out);
  border-radius: 1px;
}

.nav-mobile-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.nav-mobile-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-mobile-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Nav Overlay */
.nav-mobile-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 14, 23, 0.98);
  backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-6);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s var(--ease-out);
}
.nav-mobile-overlay.open {
  opacity: 1;
  pointer-events: all;
}
.nav-mobile-overlay .nav-link {
  font-size: 1.5rem;
  padding: var(--space-4);
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 12px 24px;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.3s var(--ease-out);
  position: relative;
  overflow: hidden;
  text-decoration: none;
  white-space: nowrap;
}

.btn-lg { padding: 16px 32px; font-size: 1rem; }
.btn-sm { padding: 8px 16px; font-size: 0.8125rem; }

.btn-primary {
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: 0 0 0 rgba(0,212,255,0);
}
.btn-primary:hover {
  box-shadow: var(--shadow-glow-cyan), 0 4px 12px rgba(0,0,0,0.3);
  transform: translateY(-2px);
  color: #fff;
}
.btn-primary:active {
  transform: scale(0.98);
}

.btn-accent {
  background: var(--gradient-accent);
  color: #fff;
  box-shadow: 0 0 0 rgba(255,107,53,0);
}
.btn-accent:hover {
  box-shadow: var(--shadow-glow-orange), 0 4px 12px rgba(0,0,0,0.3);
  transform: translateY(-2px);
  color: #fff;
}
.btn-accent:active {
  transform: scale(0.98);
}

.btn-secondary {
  background: transparent;
  color: var(--color-accent-cyan);
  border: 1px solid var(--color-accent-cyan);
}
.btn-secondary:hover {
  background: rgba(0, 212, 255, 0.08);
  box-shadow: 0 0 20px rgba(0,212,255,0.15);
  transform: translateY(-2px);
  color: var(--color-accent-cyan);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border: none;
}
.btn-ghost:hover {
  color: var(--color-accent-cyan);
  background: rgba(255,255,255,0.03);
}

/* === Cards === */
.card {
  background: var(--gradient-bg-card);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.4s var(--ease-out);
  position: relative;
}
.card:hover {
  transform: translateY(-8px);
  border-color: rgba(0, 212, 255, 0.3);
  box-shadow: var(--shadow-card-hover);
}

.card-glow {
  position: relative;
}
.card-glow::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: var(--gradient-brand);
  opacity: 0;
  transition: opacity 0.4s var(--ease-out);
  z-index: -1;
}
.card-glow:hover::before {
  opacity: 0.3;
}

/* === Project Card === */
.project-card {
  cursor: pointer;
}

.project-card .card-cover {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--color-bg-tertiary);
}

.project-card .card-cover .cover-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
  background: var(--gradient-bg-card);
  transition: transform 0.6s var(--ease-out);
}

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

.project-card .card-cover .cover-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(10,14,23,0.9) 100%);
  opacity: 0;
  transition: opacity 0.4s var(--ease-out);
}
.project-card:hover .card-cover .cover-overlay {
  opacity: 1;
}

.project-card .card-cover .card-tags {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.project-card .card-body {
  padding: var(--space-5);
}

.project-card .card-body h3 {
  margin-bottom: var(--space-2);
}

.project-card .card-body p {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.project-card .card-footer {
  padding: var(--space-3) var(--space-5);
  border-top: 1px solid rgba(255,255,255,0.04);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* === Tag === */
.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 2px 10px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid currentColor;
  border-radius: var(--radius-full);
  color: var(--color-accent-cyan);
  background: rgba(0, 212, 255, 0.08);
}
.tag-orange {
  color: var(--color-accent-orange);
  background: rgba(255, 107, 53, 0.08);
  border-color: var(--color-accent-orange);
}
.tag-green {
  color: var(--color-success);
  background: rgba(52, 211, 153, 0.08);
  border-color: var(--color-success);
}

/* Rating Stars */
.stars {
  display: inline-flex;
  gap: 2px;
  color: var(--color-accent-orange);
  font-size: 0.8125rem;
}
.stars .empty {
  color: var(--color-text-tertiary);
}

/* === Filter Tabs === */
.filter-tabs {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: var(--space-7);
}

.filter-tab {
  padding: 8px 20px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all 0.3s var(--ease-out);
}
.filter-tab:hover {
  border-color: var(--color-accent-cyan);
  color: var(--color-accent-cyan);
}
.filter-tab.active {
  background: var(--color-accent-cyan);
  border-color: var(--color-accent-cyan);
  color: var(--color-text-inverse);
}

/* === Modal === */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s var(--ease-out);
  padding: var(--space-4);
}
.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.modal-content {
  background: var(--color-bg-secondary);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-xl);
  max-width: 900px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(40px) scale(0.95);
  transition: transform 0.5s var(--ease-out-expo);
  position: relative;
}
.modal-overlay.open .modal-content {
  transform: translateY(0) scale(1);
}

.modal-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.1);
  background: rgba(0,0,0,0.5);
  color: var(--color-text-primary);
  font-size: 1.25rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s var(--ease-out);
  z-index: 1;
}
.modal-close:hover {
  background: var(--color-error);
  border-color: var(--color-error);
  transform: rotate(90deg);
}

.modal-body {
  display: grid;
  grid-template-columns: 1fr;
}
@media (min-width: 768px) {
  .modal-body {
    grid-template-columns: 1fr 1fr;
  }
}

.modal-image {
  aspect-ratio: 4 / 3;
  background: var(--color-bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
}

.modal-info {
  padding: var(--space-6);
}

.modal-info h2 {
  margin-bottom: var(--space-3);
}

.modal-info .modal-tags {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
  flex-wrap: wrap;
}

.modal-info .modal-description {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-5);
  line-height: 1.8;
}

.modal-info .modal-details {
  display: grid;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.modal-info .modal-detail-item {
  display: flex;
  justify-content: space-between;
  padding: var(--space-2) 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  font-size: 0.875rem;
}
.modal-info .modal-detail-item .detail-label {
  color: var(--color-text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.modal-info .modal-detail-item .detail-value {
  color: var(--color-text-primary);
}

.modal-info .modal-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

/* === Forms === */
.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-accent-cyan);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-2);
  text-transform: uppercase;
}
.form-label::before {
  content: '> ';
  color: var(--color-accent-orange);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  caret-color: var(--color-accent-cyan);
  transition: all 0.3s var(--ease-out);
}
.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-accent-cyan);
  background: rgba(0, 212, 255, 0.04);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1), 0 0 12px rgba(0, 212, 255, 0.05);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-tertiary);
}

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

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238a92a6' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 44px;
}

.form-file {
  position: relative;
}
.form-file input[type="file"] {
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
  top: 0;
  left: 0;
}
.form-file-label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px dashed rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-sm);
  color: var(--color-text-tertiary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.3s var(--ease-out);
}
.form-file-label:hover {
  border-color: var(--color-accent-cyan);
  color: var(--color-accent-cyan);
}

.form-error {
  color: var(--color-error);
  font-size: 0.8125rem;
  margin-top: var(--space-1);
  display: none;
}
.form-input.error,
.form-textarea.error {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-success {
  display: none;
  text-align: center;
  padding: var(--space-8);
}
.form-success.show {
  display: block;
}
.form-success .success-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(52, 211, 153, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-5);
  font-size: 2rem;
  color: var(--color-success);
  animation: success-pop 0.5s var(--ease-spring);
}
@keyframes success-pop {
  0% { transform: scale(0); }
  100% { transform: scale(1); }
}
.form-success h3 {
  margin-bottom: var(--space-2);
  color: var(--color-success);
}
.form-success p {
  color: var(--color-text-secondary);
}

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

#particles-canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-grid-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background-image:
    linear-gradient(rgba(0,212,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: var(--space-4);
  max-width: 800px;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-accent-cyan);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: var(--space-5);
  padding: 6px 16px;
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: var(--radius-full);
  background: rgba(0,212,255,0.05);
}

.hero-title {
  margin-bottom: var(--space-4);
  min-height: 1.2em;
}

.hero-title .typewriter-cursor {
  display: inline-block;
  width: 3px;
  height: 1em;
  background: var(--color-accent-cyan);
  margin-left: 4px;
  animation: cursor-blink 1s step-end infinite;
  vertical-align: text-bottom;
}
@keyframes cursor-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.hero-subtitle {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  letter-spacing: 0.05em;
}

.hero-subtitle .bracket {
  color: var(--color-accent-orange);
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  animation: scroll-bounce 2s ease-in-out infinite;
}
@keyframes scroll-bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

.hero-scroll-indicator .scroll-arrow {
  width: 20px;
  height: 20px;
  border-right: 2px solid var(--color-text-tertiary);
  border-bottom: 2px solid var(--color-text-tertiary);
  transform: rotate(45deg);
}

/* === About Page === */
.about-profile {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-7);
  align-items: start;
}
@media (min-width: 768px) {
  .about-profile {
    grid-template-columns: 300px 1fr;
  }
}

.profile-card {
  text-align: center;
  padding: var(--space-6);
}

.profile-avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-4);
  font-size: 2.5rem;
  font-family: var(--font-mono);
  color: #fff;
  position: relative;
  box-shadow: 0 0 30px rgba(0,212,255,0.2);
}
.profile-avatar::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid rgba(0,212,255,0.3);
  animation: avatar-ring 3s linear infinite;
}
@keyframes avatar-ring {
  0% { transform: rotate(0deg); border-color: rgba(0,212,255,0.3); }
  50% { transform: rotate(180deg); border-color: rgba(0,212,255,0.1); }
  100% { transform: rotate(360deg); border-color: rgba(0,212,255,0.3); }
}

.profile-card h3 {
  margin-bottom: var(--space-1);
}

.profile-card .profile-title {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-accent-cyan);
  margin-bottom: var(--space-4);
}

.profile-card .profile-bio {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  line-height: 1.8;
  text-align: left;
}

.profile-card .profile-codename {
  display: inline-block;
  margin-top: var(--space-4);
  padding: 4px 12px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-accent-orange);
  border: 1px solid rgba(255,107,53,0.2);
  border-radius: var(--radius-full);
  background: rgba(255,107,53,0.05);
}

/* Skills Radar */
.skills-container {
  padding: var(--space-6);
  text-align: center;
}

.skills-container h3 {
  margin-bottom: var(--space-5);
}

.radar-chart-wrapper {
  max-width: 400px;
  margin: 0 auto;
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: var(--space-6);
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background: rgba(0, 212, 255, 0.2);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--space-7);
  padding-left: var(--space-5);
}
.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -5px;
  top: 4px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--color-accent-cyan);
  border: 2px solid var(--color-bg-primary);
  box-shadow: 0 0 10px rgba(0,212,255,0.4);
}

.timeline-item .timeline-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-accent-cyan);
  margin-bottom: var(--space-1);
  letter-spacing: 0.1em;
}

.timeline-item h4 {
  margin-bottom: var(--space-1);
}

.timeline-item p {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

/* === Services Pricing === */
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  align-items: start;
}
@media (min-width: 640px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1024px) {
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pricing-card {
  padding: var(--space-6);
  text-align: center;
  position: relative;
  transition: all 0.4s var(--ease-out);
}
.pricing-card:hover {
  transform: translateY(-12px);
}

.pricing-card.popular {
  border-color: var(--color-accent-cyan);
  box-shadow: 0 0 30px rgba(0,212,255,0.1);
}

.pricing-card .popular-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 16px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--gradient-brand);
  color: #fff;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.pricing-card .pricing-name {
  font-family: var(--font-body);
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.pricing-card .pricing-category {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-4);
}

.pricing-card .pricing-price {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-accent-cyan);
  margin-bottom: var(--space-1);
}
.pricing-card .pricing-period {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-5);
}

.pricing-card .pricing-features {
  text-align: left;
  margin-bottom: var(--space-6);
}

.pricing-card .pricing-features li {
  padding: var(--space-2) 0;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
}

.pricing-card .pricing-features li::before {
  content: '>';
  color: var(--color-accent-cyan);
  font-family: var(--font-mono);
  flex-shrink: 0;
}

.pricing-card .pricing-addons {
  margin-bottom: var(--space-5);
  padding-top: var(--space-3);
  border-top: 1px solid rgba(255,255,255,0.05);
}

.pricing-card .pricing-addons .addon-label {
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-2);
  display: block;
}

.pricing-card .pricing-addons .addon-item {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  padding: var(--space-1) 0;
}

.pricing-card .pricing-delivery {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
  margin-top: var(--space-3);
}

/* === Contact Page === */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-7);
}
@media (min-width: 768px) {
  .contact-grid {
    grid-template-columns: 1.2fr 1fr;
  }
}

.contact-form-container {
  padding: var(--space-6);
}

.contact-info-container {
  padding: var(--space-6);
}

.contact-info-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.contact-info-item:last-child {
  border-bottom: none;
}

.contact-info-item .info-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: rgba(0,212,255,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  flex-shrink: 0;
}

.contact-info-item .info-label {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.contact-info-item .info-value {
  font-size: 0.9375rem;
  color: var(--color-text-primary);
}

.social-links {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-5);
  flex-wrap: wrap;
}

.social-link {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255,255,255,0.1);
  background: rgba(255,255,255,0.03);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  transition: all 0.3s var(--ease-out);
  text-decoration: none;
}
.social-link:hover {
  border-color: var(--color-accent-cyan);
  background: rgba(0,212,255,0.08);
  color: var(--color-accent-cyan);
  transform: translateY(-3px);
  box-shadow: 0 0 20px rgba(0,212,255,0.15);
}

/* === Blog Page === */
.blog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}
@media (min-width: 640px) {
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1024px) {
  .blog-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.blog-card {
  padding: var(--space-6);
}

.blog-card .blog-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
}

.blog-card .blog-meta .blog-category {
  color: var(--color-accent-cyan);
}

.blog-card h3 {
  margin-bottom: var(--space-2);
}

.blog-card .blog-excerpt {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: var(--space-4);
}

.blog-card .blog-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8125rem;
}

.blog-card .blog-footer .read-more {
  color: var(--color-accent-cyan);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

/* === Footer === */
.footer {
  border-top: 1px solid rgba(255,255,255,0.05);
  padding: var(--space-8) 0;
  text-align: center;
}

.footer .footer-brand {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-tertiary);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.footer .footer-links {
  display: flex;
  justify-content: center;
  gap: var(--space-5);
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
}

.footer .footer-links a {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.05em;
}
.footer .footer-links a:hover {
  color: var(--color-accent-cyan);
}

.footer .footer-copy {
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
}

/* === Scroll Reveal === */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.7s var(--ease-out-expo);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* === Page Transition === */
.page-wrapper {
  opacity: 0;
  animation: page-fade-in 0.6s var(--ease-out-expo) forwards;
}
@keyframes page-fade-in {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* === Responsive === */
@media (max-width: 767px) {
  .hero-title {
    font-size: 1.75rem;
  }
  .pricing-card.popular {
    transform: none;
  }
  .pricing-card:hover {
    transform: translateY(-4px);
  }
  .project-card:hover {
    transform: translateY(-4px);
  }
  .reveal:nth-child(n) {
    transition-delay: 0s !important;
  }
  .modal-content {
    margin: 0;
    border-radius: var(--radius-lg);
  }
  .modal-body {
    grid-template-columns: 1fr;
  }
  .modal-image {
    aspect-ratio: 16 / 9;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .hero-scroll-indicator {
    animation: none;
  }
  .hero-title .typewriter-cursor {
    animation: none;
    opacity: 1;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* === Loading Bar (top) === */
.top-loading-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: rgba(0, 212, 255, 0.1);
  z-index: 99999;
  overflow: hidden;
  opacity: 0;
  transition: opacity 0.3s;
}
.top-loading-bar.active {
  opacity: 1;
}
.top-loading-bar::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 30%;
  height: 100%;
  background: var(--gradient-brand);
  animation: loading-bar-move 1.5s ease-in-out infinite;
}
@keyframes loading-bar-move {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(400%); }
}

/* === 404 / Empty State === */
.empty-state {
  text-align: center;
  padding: var(--space-9) var(--space-4);
}
.empty-state .empty-icon {
  font-size: 3rem;
  margin-bottom: var(--space-4);
  opacity: 0.3;
}
.empty-state h3 {
  margin-bottom: var(--space-3);
}
.empty-state p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-5);
}

/* === Grid Layouts === */
.grid-2 { display: grid; grid-template-columns: 1fr; gap: var(--space-5); }
.grid-3 { display: grid; grid-template-columns: 1fr; gap: var(--space-5); }
@media (min-width: 640px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

/* === Navigation Dot Indicator (side) === */
.nav-dots {
  position: fixed;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 500;
  display: none;
  flex-direction: column;
  gap: 12px;
}
@media (min-width: 1024px) {
  .nav-dots { display: flex; }
}

.nav-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-text-tertiary);
  cursor: pointer;
  transition: all 0.3s var(--ease-out);
  border: none;
  padding: 0;
}
.nav-dot:hover,
.nav-dot.active {
  background: var(--color-accent-cyan);
  box-shadow: 0 0 8px rgba(0,212,255,0.5);
  transform: scale(1.3);
}

/* === Counters === */
.counter-number {
  font-family: var(--font-display);
  font-size: 2.5rem;
  color: var(--color-accent-cyan);
}

/* === Ripple (JS will handle) === */
.ripple-container {
  position: relative;
  overflow: hidden;
}