/* ==========================================================================
   PORTFOLIO DESIGN SYSTEM — Clean Minimal (Arsaludin-Inspired)
   Light-first with dark mode toggle. Border-based cards, blue accent.
   ========================================================================== */

/* ==========================================================================
   1. CSS CUSTOM PROPERTIES (DESIGN TOKENS)
   ========================================================================== */
:root {
  /* Page width - expansive fullscreen layout */
  --page-width: min(1640px, 94vw);

  /* Light theme (default) */
  --bg-primary: #ffffff;
  --bg-secondary: #f5f5f5;
  --bg-page: #f0f2f5;
  --text-primary: #171717;
  --text-secondary: #525252;
  --text-muted: #a3a3a3;
  --border-primary: #e5e5e5;
  --border-secondary: #d4d4d4;

  /* Accent */
  --accent: #3b82f6;
  --accent-light: #60a5fa;
  --accent-dark: #2563eb;
  --accent-bg: rgba(59, 130, 246, 0.08);

  /* Semantic Colors */
  --color-yellow: #ca8a04;
  --color-yellow-bg: rgba(202, 138, 4, 0.1);
  --color-blue: #2563eb;
  --color-blue-bg: rgba(37, 99, 235, 0.1);
  --color-green: #16a34a;
  --color-green-bg: rgba(22, 163, 74, 0.1);
  --color-red: #ef4444;
  --color-red-bg: rgba(239, 68, 68, 0.1);

  /* Neutral for illustrations */
  --neutral-high: #d4d4d4;
  --neutral-med: #e5e5e5;
  --neutral-low: #f5f5f5;

  /* Typography */
  --font-display: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'GeistMono', ui-monospace, monospace;

  /* Font Sizes */
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.25rem;
  --fs-2xl: 1.5rem;
  --fs-3xl: 1.875rem;
  --fs-4xl: 2.25rem;
  --fs-5xl: 3rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;

  /* Z-index layers */
  --z-nav: 100;
  --z-overlay: 200;
  --z-modal: 300;
  --z-back-top: 90;
}

/* Dark theme */
[data-theme="dark"] {
  --bg-primary: #0a0a0a;
  --bg-secondary: #171717;
  --bg-page: #0e0e0e;
  --text-primary: #fafafa;
  --text-secondary: #a3a3a3;
  --text-muted: #525252;
  --border-primary: #262626;
  --border-secondary: #404040;

  --neutral-high: #404040;
  --neutral-med: #2a2a2a;
  --neutral-low: #1a1a1a;
}


/* ==========================================================================
   2. RESET & BASE
   ========================================================================== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  max-width: 100vw;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-base), color var(--transition-base);
}

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

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
}


/* ==========================================================================
   3. LAYOUT UTILITIES
   ========================================================================== */
.page-container {
  max-width: var(--page-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
  width: 100%;
}

@media (min-width: 768px) {
  .page-container {
    padding: 0 clamp(1.5rem, 3vw, 3.5rem);
  }
}

.section-py {
  padding-top: var(--space-12);
  padding-bottom: var(--space-12);
}

@media (min-width: 1024px) {
  .section-py {
    padding-top: var(--space-24);
    padding-bottom: var(--space-24);
  }
}


/* ==========================================================================
   4. HEADER / NAVIGATION
   ========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-primary);
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

.header-inner {
  max-width: var(--page-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  width: 100%;
}

@media (min-width: 768px) {
  .header-inner {
    padding: var(--space-4) clamp(1.5rem, 3vw, 3.5rem);
  }
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.logo {
  display: flex;
  align-items: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-xl);
  color: var(--text-primary);
  flex-shrink: 0;
}

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

/* Desktop Nav */
.nav-links {
  display: none;
  align-items: center;
  gap: var(--space-6);
  padding-left: var(--space-6);
}

@media (min-width: 1024px) {
  .nav-links {
    display: flex;
  }
}

.nav-links a {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  transition: color var(--transition-base);
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
}

.nav-links a.active {
  font-weight: 500;
}

/* Header Right Controls */
.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.btn-download-resume {
  display: none;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background-color: var(--text-primary);
  color: var(--bg-primary);
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
  font-weight: 500;
  transition: all var(--transition-base);
}

.btn-download-resume:hover {
  opacity: 0.85;
}

.btn-download-resume:active {
  transform: scale(0.95);
}

@media (min-width: 1024px) {
  .btn-download-resume {
    display: inline-flex;
  }
}

.btn-download-resume svg {
  width: 16px;
  height: 16px;
}

/* Icon Buttons (theme toggle, etc.) */
.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-base);
}

.icon-btn:hover {
  background-color: var(--neutral-low);
}

[data-theme="dark"] .icon-btn:hover {
  background-color: var(--neutral-med);
}

.icon-btn svg {
  width: 20px;
  height: 20px;
}

/* Theme toggle icons */
.theme-toggle .icon-sun {
  display: none;
}

.theme-toggle .icon-moon {
  display: block;
}

[data-theme="dark"] .theme-toggle .icon-sun {
  display: block;
}

[data-theme="dark"] .theme-toggle .icon-moon {
  display: none;
}

/* Mobile Menu Toggle */
.mobile-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-base);
}

.mobile-toggle:hover {
  background-color: var(--neutral-low);
}

@media (min-width: 1024px) {
  .mobile-toggle {
    display: none;
  }
}

.mobile-toggle svg {
  width: 20px;
  height: 20px;
}

.mobile-toggle .icon-close {
  display: none;
}

.mobile-toggle.active .icon-menu {
  display: none;
}

.mobile-toggle.active .icon-close {
  display: block;
}

/* Mobile Nav Overlay */
.mobile-nav {
  display: none;
  position: fixed;
  top: 69px;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-primary);
  z-index: calc(var(--z-nav) - 1);
  padding: var(--space-6);
  flex-direction: column;
  gap: var(--space-2);
  overflow-y: auto;
  transition: background-color var(--transition-base);
}

.mobile-nav.active {
  display: flex;
}

.mobile-nav a {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-size: var(--fs-base);
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.mobile-nav a:hover,
.mobile-nav a.active {
  color: var(--accent);
  background-color: var(--accent-bg);
}

.mobile-nav .mobile-resume-btn {
  margin-top: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background-color: var(--text-primary);
  color: var(--bg-primary);
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
  font-weight: 500;
}


/* ==========================================================================
   5. HERO / PROFILE SECTION
   ========================================================================== */
.hero {
  padding-top: 100px;
  padding-bottom: var(--space-12);
}

@media (min-width: 1024px) {
  .hero {
    padding-top: 120px;
    padding-bottom: var(--space-24);
  }
}

/* Banner */
.hero-banner {
  position: relative;
  width: 100%;
  height: 240px;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  border: 1px solid var(--border-primary);
  background-color: #000;
}

@media (min-width: 768px) {
  .hero-banner {
    height: 360px;
  }
}

@media (min-width: 1024px) {
  .hero-banner {
    height: 460px;
  }
}

@media (min-width: 1280px) {
  .hero-banner {
    height: 520px;
  }
}

@media (min-width: 1536px) {
  .hero-banner {
    height: 580px;
  }
}

.hero-banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
}

.hero-banner-text {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  padding: 0 var(--space-6);
  padding-bottom: var(--space-8);
}

.hero-banner-text span {
  font-family: var(--font-display);
  font-size: clamp(2rem, 7vw, 6.5rem);
  font-weight: 700;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.1));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

/* Profile Info Grid */
.profile-info {
  position: relative;
  z-index: 1;
  margin-top: -80px;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 768px) {
  .profile-info {
    grid-template-columns: auto 1fr;
    gap: var(--space-6);
  }
}

@media (min-width: 1024px) {
  .profile-info {
    grid-template-columns: auto 1fr auto;
    gap: var(--space-8);
  }
}

/* Profile Photo */
.profile-photo-wrap {
  display: flex;
  justify-content: flex-start;
}

.profile-photo {
  position: relative;
  width: 120px;
  height: 150px;
  border-radius: 28px;
  overflow: hidden;
  border: 4px solid var(--bg-primary);
  flex-shrink: 0;
  margin-left: var(--space-4);
  transition: border-color var(--transition-base);
}

@media (min-width: 768px) {
  .profile-photo {
    width: 140px;
    height: 175px;
    border-radius: 36px;
    margin-left: var(--space-6);
  }
}

@media (min-width: 1024px) {
  .profile-photo {
    width: 160px;
    height: 200px;
    border-radius: 44px;
    border-width: 6px;
  }
}

.profile-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
}

/* Profile Text */
.profile-text {
  padding-top: var(--space-2);
}

@media (min-width: 768px) {
  .profile-text {
    padding-top: 86px;
  }
}

.profile-name {
  font-size: var(--fs-3xl);
  font-weight: 600;
  line-height: 1.2;
}

@media (min-width: 768px) {
  .profile-name {
    font-size: var(--fs-4xl);
  }
}

@media (min-width: 1024px) {
  .profile-name {
    font-size: var(--fs-5xl);
  }
}

.profile-title {
  color: var(--accent);
  font-size: var(--fs-lg);
  font-weight: 500;
  margin-top: var(--space-1);
}

@media (min-width: 768px) {
  .profile-title {
    font-size: var(--fs-xl);
  }
}

@media (min-width: 1024px) {
  .profile-title {
    font-size: var(--fs-2xl);
  }
}

.profile-location {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  color: var(--text-secondary);
  font-size: var(--fs-sm);
  margin-top: var(--space-1);
}

.profile-location svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

/* Stats Table */
.profile-stats {
  overflow-x: auto;
  padding-top: var(--space-2);
}

@media (min-width: 1024px) {
  .profile-stats {
    padding-top: 86px;
    margin-left: auto;
  }
}

.stats-table {
  border-collapse: separate;
  border-spacing: 0;
}

.stats-table th {
  color: var(--text-secondary);
  font-size: var(--fs-sm);
  font-weight: 400;
  padding: var(--space-1) var(--space-4);
  text-align: center;
  min-width: 80px;
}

.stats-table td {
  font-size: var(--fs-xl);
  font-weight: 600;
  text-align: center;
  padding: var(--space-1) var(--space-4);
}

@media (min-width: 768px) {
  .stats-table td {
    font-size: var(--fs-2xl);
  }
}

@media (min-width: 1024px) {
  .stats-table td {
    font-size: var(--fs-3xl);
  }
}

/* Profile Bio */
.profile-bio {
  grid-column: 1 / -1;
  color: var(--text-secondary);
  font-size: var(--fs-sm);
  max-width: 700px;
  line-height: 1.7;
}

@media (min-width: 768px) {
  .profile-bio {
    font-size: var(--fs-base);
  }
}


/* ==========================================================================
   6. SECTION HEADERS
   ========================================================================== */
.section-header {
  text-align: center;
  margin-bottom: var(--space-8);
}

@media (min-width: 1024px) {
  .section-header {
    margin-bottom: var(--space-10);
  }
}

.section-header h2 {
  font-size: var(--fs-3xl);
}

@media (min-width: 768px) {
  .section-header h2 {
    font-size: var(--fs-4xl);
  }
}

@media (min-width: 1024px) {
  .section-header h2 {
    font-size: var(--fs-5xl);
  }
}

.section-header p {
  color: var(--text-secondary);
  font-size: var(--fs-sm);
  margin-top: var(--space-3);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

@media (min-width: 768px) {
  .section-header p {
    font-size: var(--fs-base);
  }
}


/* ==========================================================================
   7. SKILLS & SERVICES CARDS
   ========================================================================== */
.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
  }
}

@media (min-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
  }
}

@media (min-width: 1440px) {
  .services-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
  }
}

.services-carousel-dots {
  display: none;
}

.service-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-2xl);
  background-color: var(--bg-primary);
  overflow: hidden;
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

/* Service Illustration Area */
.service-illustration {
  position: relative;
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
  overflow: hidden;
}

.service-illustration::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image: radial-gradient(rgba(128, 128, 128, 0.2) 1px, transparent 1px);
  background-size: 16px 16px;
  mask-image: radial-gradient(ellipse 60% 60% at 50% 20%, #000 70%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 60% 60% at 50% 20%, #000 70%, transparent 100%);
}

/* Mock Browser Window */
.mock-browser {
  position: relative;
  z-index: 1;
  width: 200px;
  height: 140px;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

@media (min-width: 640px) {
  .mock-browser {
    width: 220px;
    height: 160px;
  }
}

.mock-browser-bar {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 8px;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-primary);
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

.mock-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 1px solid var(--border-primary);
}

.mock-dot.red {
  background-color: var(--color-red);
}

.mock-dot.yellow {
  background-color: var(--color-yellow);
}

.mock-dot.green {
  background-color: var(--color-green);
}

.mock-url {
  flex: 1;
  height: 8px;
  background-color: var(--neutral-high);
  border-radius: 2px;
  margin-left: 4px;
}

.mock-browser-body {
  flex: 1;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.mock-line {
  height: 4px;
  border-radius: 2px;
  background-color: var(--neutral-med);
}

.mock-line.w-75 {
  width: 75%;
}

.mock-line.w-50 {
  width: 50%;
}

.mock-line.w-100 {
  width: 100%;
}

.mock-line.w-60 {
  width: 60%;
}

.mock-line.accent {
  background-color: var(--accent);
}

.mock-line.green {
  background-color: var(--color-green);
}

.mock-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  margin-top: auto;
}

.mock-block {
  height: 24px;
  background-color: var(--bg-secondary);
  border-radius: 3px;
  position: relative;
  overflow: hidden;
  transition: background-color var(--transition-base);
}

.mock-block::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.mock-block.accent-bar::after {
  background-color: var(--accent);
}

.mock-block.green-bar::after {
  background-color: var(--color-green);
}

.mock-block.yellow-bar::after {
  background-color: var(--color-yellow);
}

/* Service Card Info */
.service-info {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: var(--space-5) var(--space-5) var(--space-6);
}

@media (min-width: 768px) {
  .service-info {
    padding: var(--space-5) var(--space-6) var(--space-6);
  }
}

/* Level Badge */
.level-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-md);
  font-size: var(--fs-xs);
  font-weight: 500;
  width: fit-content;
  margin-bottom: var(--space-2);
}

.level-badge.expert {
  background-color: var(--color-yellow-bg);
  color: var(--color-yellow);
}

.level-badge.intermediate {
  background-color: var(--color-blue-bg);
  color: var(--color-blue);
}

.level-badge.advanced {
  background-color: var(--color-green-bg);
  color: var(--color-green);
}

.level-badge svg {
  width: 14px;
  height: 14px;
}

.service-info h3 {
  font-size: var(--fs-lg);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

@media (min-width: 768px) {
  .service-info h3 {
    font-size: var(--fs-xl);
  }
}

@media (min-width: 1280px) {
  .service-info h3 {
    font-size: var(--fs-2xl);
  }
}

.service-info>p {
  color: var(--text-secondary);
  font-size: var(--fs-sm);
  line-height: 1.6;
  margin-bottom: var(--space-6);
}

/* Tech Tags */
.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: auto;
}

.tech-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background-color: var(--neutral-low);
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  font-size: var(--fs-xs);
  font-weight: 500;
  transition: all var(--transition-base);
}

.tech-tag:hover {
  transform: scale(1.05);
}

.tech-tag svg {
  width: 14px;
  height: 14px;
}

.tech-tag-more {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  background-color: var(--neutral-low);
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  font-size: var(--fs-xs);
  font-weight: 500;
}


/* ==========================================================================
   8. FEATURED PROJECTS
   ========================================================================== */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .projects-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
  }
}

@media (min-width: 1440px) {
  .projects-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
  }
}

.project-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-2xl);
  background-color: var(--bg-primary);
  overflow: hidden;
  transition: all var(--transition-base);
}

.project-card:hover {
  border-color: var(--border-secondary);
  transform: translateY(-4px);
}

.project-image {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: var(--bg-secondary);
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.project-card:hover .project-image img {
  transform: scale(1.05);
}

.project-image-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: var(--fs-2xl);
  font-weight: 700;
  color: var(--text-muted);
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.project-info {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: var(--space-5) var(--space-5) var(--space-6);
}

.project-info h3 {
  font-size: var(--fs-lg);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

@media (min-width: 768px) {
  .project-info h3 {
    font-size: var(--fs-xl);
  }
}

.project-info>p {
  color: var(--text-secondary);
  font-size: var(--fs-sm);
  line-height: 1.6;
  margin-bottom: var(--space-4);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.project-links {
  display: flex;
  gap: var(--space-3);
  margin-top: auto;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-base);
}

.project-link:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.project-link svg {
  width: 14px;
  height: 14px;
}

/* View All Projects Link */
.view-all-link {
  display: flex;
  justify-content: center;
  margin-top: var(--space-8);
}

.view-all-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-full);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-base);
}

.view-all-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.view-all-btn svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-base);
}

.view-all-btn:hover svg {
  transform: translateX(4px);
}


/* ==========================================================================
   9. EXPERIENCE TIMELINE
   ========================================================================== */
.experience-section {
  max-width: 900px;
  margin: 0 auto;
}

.experience-item {
  position: relative;
  padding-left: var(--space-8);
  padding-bottom: var(--space-10);
  border-left: 2px solid var(--border-primary);
}

.experience-item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.experience-dot {
  position: absolute;
  left: -7px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--accent);
  border: 2px solid var(--bg-page);
}

.experience-date {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  margin-bottom: var(--space-1);
}

.experience-role {
  font-size: var(--fs-lg);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

@media (min-width: 768px) {
  .experience-role {
    font-size: var(--fs-xl);
  }
}

.experience-company {
  font-size: var(--fs-sm);
  color: var(--accent);
  font-weight: 500;
  margin-bottom: var(--space-3);
}

.experience-desc {
  color: var(--text-secondary);
  font-size: var(--fs-sm);
  line-height: 1.7;
}

.experience-desc li {
  position: relative;
  padding-left: var(--space-5);
  margin-bottom: var(--space-2);
}

.experience-desc li::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 10px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background-color: var(--text-muted);
}


/* ==========================================================================
   10. EDUCATION
   ========================================================================== */
.education-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  max-width: 900px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .education-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.education-card {
  padding: var(--space-6);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-2xl);
  background-color: var(--bg-primary);
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

.education-card h3 {
  font-size: var(--fs-lg);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.education-major {
  color: var(--accent);
  font-size: var(--fs-sm);
  font-weight: 500;
  margin-bottom: var(--space-2);
}

.education-period {
  color: var(--text-muted);
  font-size: var(--fs-sm);
}

.education-grade {
  margin-top: var(--space-3);
  font-size: var(--fs-sm);
  color: var(--text-secondary);
}

.education-grade strong {
  color: var(--text-primary);
}


/* ==========================================================================
   11. CONTACT / FOOTER CTA
   ========================================================================== */
.footer-cta {
  text-align: center;
  padding-top: var(--space-16);
  padding-bottom: var(--space-12);
  border-top: 1px solid var(--border-primary);
}

.footer-cta-subtitle {
  color: var(--accent);
  font-size: var(--fs-base);
  font-weight: 500;
  margin-bottom: var(--space-3);
}

@media (min-width: 768px) {
  .footer-cta-subtitle {
    font-size: var(--fs-lg);
  }
}

.footer-cta h2 {
  font-size: var(--fs-3xl);
  font-weight: 600;
  margin-bottom: var(--space-8);
}

@media (min-width: 768px) {
  .footer-cta h2 {
    font-size: var(--fs-4xl);
  }
}

@media (min-width: 1024px) {
  .footer-cta h2 {
    font-size: var(--fs-5xl);
  }
}

.contact-email-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background-color: var(--text-primary);
  color: var(--bg-primary);
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
  font-weight: 500;
  transition: all var(--transition-base);
}

.contact-email-btn:hover {
  opacity: 0.85;
  transform: translateY(-2px);
}

.contact-email-btn:active {
  transform: scale(0.95);
}

.contact-email-btn svg {
  width: 16px;
  height: 16px;
}

/* Local Time */
.local-time {
  margin-top: var(--space-8);
  color: var(--text-muted);
  font-size: var(--fs-sm);
}

.local-time strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* Social Links */
.social-links {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border-primary);
  color: var(--text-secondary);
  transition: all var(--transition-base);
}

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

.social-link svg {
  width: 18px;
  height: 18px;
}


/* ==========================================================================
   12. FOOTER
   ========================================================================== */
.footer {
  border-top: 1px solid var(--border-primary);
  padding: var(--space-6) 0;
}

.footer-inner {
  max-width: var(--page-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  width: 100%;
}

@media (min-width: 768px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    padding: 0 clamp(1.5rem, 3vw, 3.5rem);
  }
}

.footer-copy {
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: var(--space-6);
}

.footer-links a {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  transition: color var(--transition-base);
}

.footer-links a:hover {
  color: var(--text-primary);
}


/* ==========================================================================
   13. BACK TO TOP BUTTON
   ========================================================================== */
.back-to-top {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-back-top);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: all var(--transition-base);
}

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

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

.back-to-top svg {
  width: 20px;
  height: 20px;
}


/* ==========================================================================
   14. ANIMATIONS
   ========================================================================== */

/* Fade Up */
.anim-fade-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.anim-fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Fade Left */
.anim-fade-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.anim-fade-left.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Blur Up */
.anim-blur-up {
  opacity: 0;
  filter: blur(10px);
  transform: translateY(40px);
  transition: opacity 0.6s ease-out, filter 0.6s ease-out, transform 0.6s ease-out;
}

.anim-blur-up.visible {
  opacity: 1;
  filter: blur(0);
  transform: translateY(0);
}

/* Scale In */
.anim-scale-in {
  opacity: 0;
  transform: scale(0.95);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.anim-scale-in.visible {
  opacity: 1;
  transform: scale(1);
}

/* Stagger delays */
.stagger-1 {
  transition-delay: 0.05s;
}

.stagger-2 {
  transition-delay: 0.1s;
}

.stagger-3 {
  transition-delay: 0.15s;
}

.stagger-4 {
  transition-delay: 0.2s;
}

.stagger-5 {
  transition-delay: 0.25s;
}

.stagger-6 {
  transition-delay: 0.3s;
}


/* ==========================================================================
   15. MISC / HELPERS
   ========================================================================== */

/* Screen Reader Only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Selection */
::selection {
  background-color: var(--accent);
  color: #fff;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

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

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

/* Body lock for mobile nav */
body.nav-open {
  overflow: hidden;
}


/* ==========================================================================
   16. BUTTON & FORM COMPONENTS
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: var(--fs-sm);
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--text-primary);
  color: var(--bg-primary);
}

.btn-primary:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: scale(0.97);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--border-primary);
  color: var(--text-secondary);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-sm {
  padding: 4px 10px;
  font-size: var(--fs-xs);
}

/* Form Groups */
.form-group {
  position: relative;
  margin-bottom: var(--space-4);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: inherit;
  font-size: var(--fs-sm);
  outline: none;
  transition: border-color var(--transition-base), background-color var(--transition-base);
}

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

.form-group label {
  display: block;
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-1);
}


/* ==========================================================================
   17. CERTIFICATES PAGE & GRID
   ========================================================================== */
.certs-page {
  padding-top: 100px;
  padding-bottom: var(--space-16);
  min-height: 80vh;
}

@media (min-width: 1024px) {
  .certs-page {
    padding-top: 120px;
    padding-bottom: var(--space-24);
  }
}

.certs-header {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--border-primary);
}

@media (min-width: 640px) {
  .certs-header {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
  }
}

.certs-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 640px) {
  .certs-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .certs-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
  }
}

@media (min-width: 1440px) {
  .certs-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
  }
}

.cert-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-2xl);
  background-color: var(--bg-primary);
  overflow: hidden;
  transition: all var(--transition-base);
  cursor: pointer;
}

.cert-card:hover {
  border-color: var(--border-secondary);
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] .cert-card:hover {
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
}

.cert-image {
  position: relative;
  aspect-ratio: 16 / 10;
  background-color: var(--bg-secondary);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cert-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 20%;
  transition: transform var(--transition-slow);
}

.cert-card:hover .cert-image img {
  transform: scale(1.05);
}

.cert-image-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  color: var(--text-muted);
}

.cert-image-placeholder svg {
  width: 48px;
  height: 48px;
}

.cert-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: var(--space-5);
}

.cert-body h3 {
  font-size: var(--fs-lg);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.cert-issuer {
  color: var(--accent);
  font-size: var(--fs-sm);
  font-weight: 500;
}

.cert-date {
  color: var(--text-muted);
  font-size: var(--fs-xs);
  margin-top: 2px;
  margin-bottom: var(--space-3);
}

.cert-desc {
  color: var(--text-secondary);
  font-size: var(--fs-sm);
  line-height: 1.5;
  margin-bottom: var(--space-3);
}

.cert-credential {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  margin-top: auto;
  padding-top: var(--space-2);
}

.cert-credential a {
  color: var(--accent);
  text-decoration: underline;
}

.cert-actions {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--border-primary);
}

.certs-empty {
  display: none;
  text-align: center;
  padding: var(--space-16) var(--space-4);
  border: 1px dashed var(--border-secondary);
  border-radius: var(--radius-2xl);
  color: var(--text-muted);
}

.certs-empty svg {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-3);
}

.certs-empty h3 {
  font-size: var(--fs-xl);
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}


/* ==========================================================================
   18. MODAL & LIGHTBOX
   ========================================================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  width: 100%;
  max-width: 520px;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
  transform: scale(0.95);
  transition: transform var(--transition-base);
  max-height: 90vh;
  display: flex;
  flex-direction: column;
}

.modal-overlay.active .modal {
  transform: scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--border-primary);
}

.modal-header h3 {
  font-size: var(--fs-lg);
  font-weight: 600;
}

.modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background-color: var(--neutral-low);
  color: var(--text-primary);
}

.modal-body {
  padding: var(--space-6);
  overflow-y: auto;
}

.cert-preview-area {
  width: 100%;
  height: 160px;
  background-color: var(--bg-secondary);
  border: 1px dashed var(--border-secondary);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.cert-preview-area img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
}

.placeholder-text {
  font-size: var(--fs-xs);
  color: var(--text-muted);
}

/* Lightbox */
.lightbox-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  background-color: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.lightbox-overlay.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-close {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.lightbox-close:hover {
  background-color: rgba(255, 255, 255, 0.2);
}

.lightbox-content {
  max-width: 960px;
  width: 100%;
  max-height: 92vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lightbox-content img {
  max-width: 100%;
  max-height: 82vh;
  object-fit: contain;
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.lightbox-info {
  margin-top: var(--space-4);
  text-align: center;
  color: #fff;
}

.lightbox-info h3 {
  font-size: var(--fs-xl);
  font-weight: 600;
}

.lightbox-info p {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--fs-sm);
  margin-top: 4px;
}