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

:root {
  --color-bg: #fffcf9;
  --color-surface: #fef7f0;
  --color-border: #f0e6db;
  --color-text: #2d2418;
  --color-text-secondary: #7a6e62;
  --color-accent: #e86c3a;
  --color-accent-hover: #d45a2a;
  --color-purple: #8b5cf6;
  --color-teal: #14b8a6;
  --color-rose: #f43f5e;
  --color-amber: #f59e0b;
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --radius: 12px;
  --shadow-sm: 0 1px 3px rgba(45, 36, 24, 0.06);
  --shadow-md: 0 4px 16px rgba(45, 36, 24, 0.1);
  --shadow-lg: 0 8px 30px rgba(45, 36, 24, 0.12);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Dark Mode ===== */
[data-theme="dark"] {
  --color-bg: #1a1a2e;
  --color-surface: #16213e;
  --color-border: #2a2a4a;
  --color-text: #e8e6e3;
  --color-text-secondary: #a09b94;
  --color-accent: #f0825c;
  --color-accent-hover: #f59a7a;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.35);
}

[data-theme="dark"] body {
  background-image: radial-gradient(ellipse at 10% 0%, rgba(139, 92, 246, 0.08) 0%, transparent 50%),
                    radial-gradient(ellipse at 90% 100%, rgba(232, 108, 58, 0.06) 0%, transparent 50%);
}

[data-theme="dark"] .site-header {
  background: rgba(26, 26, 46, 0.85);
}

[data-theme="dark"] .project-card,
[data-theme="dark"] .about-links a {
  background: var(--color-surface);
}

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

body {
  font-family: var(--font-main);
  color: var(--color-text);
  background: var(--color-bg);
  background-image: radial-gradient(ellipse at 10% 0%, rgba(139, 92, 246, 0.04) 0%, transparent 50%),
                    radial-gradient(ellipse at 90% 100%, rgba(232, 108, 58, 0.04) 0%, transparent 50%);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* RTL support */
[dir="rtl"] body {
  font-family: 'Rubik', var(--font-main);
}

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

a:hover {
  color: var(--color-accent-hover);
}

/* ===== Header / Nav ===== */
.site-header {
  border-bottom: 1px solid var(--color-border);
  background: rgba(255, 252, 249, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-logo {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

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

.site-logo span {
  color: var(--color-text-secondary);
  font-weight: 400;
}

nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

nav a {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: color var(--transition);
}

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

nav a.active {
  position: relative;
}

nav a.active::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 1px;
}

/* ===== Language Toggle ===== */
.lang-toggle {
  display: inline-flex;
  border: 1px solid var(--color-border);
  border-radius: 99px;
  overflow: hidden;
  font-size: 0.8125rem;
}

.lang-toggle button {
  background: none;
  border: none;
  padding: 0.35rem 0.85rem;
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: all var(--transition);
}

.lang-toggle button.active {
  background: var(--color-accent);
  color: #fff;
}

.lang-toggle button:not(.active):hover {
  background: var(--color-surface);
}

/* ===== Main Content ===== */
main {
  flex: 1;
  max-width: 960px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
  width: 100%;
}

/* ===== Hero Section ===== */
.hero {
  margin-bottom: 3rem;
}

.hero h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.25rem;
  background: linear-gradient(135deg, var(--color-accent), var(--color-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero .subtitle {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

.hero .bio {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  line-height: 1.7;
}

/* ===== Section Titles ===== */
.section-title {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid transparent;
  border-image: linear-gradient(90deg, var(--color-accent), var(--color-teal), var(--color-purple)) 1;
}

/* ===== Project Cards ===== */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.project-card {
  display: block;
  padding: 1.5rem;
  padding-left: 1.75rem;
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-border);
  border-radius: var(--radius);
  background: #fff;
  transition: all var(--transition);
  position: relative;
}

[dir="rtl"] .project-card {
  padding-left: 1.5rem;
  padding-right: 1.75rem;
  border-left: 1px solid var(--color-border);
  border-right: 3px solid var(--color-border);
}

.project-card:nth-child(1) { border-left-color: var(--color-accent); }
.project-card:nth-child(2) { border-left-color: var(--color-teal); }
.project-card:nth-child(3) { border-left-color: var(--color-purple); }

[dir="rtl"] .project-card:nth-child(1) { border-left-color: var(--color-border); border-right-color: var(--color-accent); }
[dir="rtl"] .project-card:nth-child(2) { border-left-color: var(--color-border); border-right-color: var(--color-teal); }
[dir="rtl"] .project-card:nth-child(3) { border-left-color: var(--color-border); border-right-color: var(--color-purple); }

.project-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.project-card:nth-child(1):hover { border-left-color: var(--color-accent); }
.project-card:nth-child(2):hover { border-left-color: var(--color-teal); }
.project-card:nth-child(3):hover { border-left-color: var(--color-purple); }

.project-card .project-name {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.25rem;
}

.project-card .project-subtitle {
  font-size: 0.875rem;
  color: var(--color-accent);
  font-weight: 500;
  margin-bottom: 0.75rem;
}

.project-card:nth-child(1) .project-subtitle { color: var(--color-accent); }
.project-card:nth-child(2) .project-subtitle { color: var(--color-teal); }
.project-card:nth-child(3) .project-subtitle { color: var(--color-purple); }

.project-card .project-desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.project-card .project-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.75rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-accent);
}

.project-card:nth-child(1) .project-link { color: var(--color-accent); }
.project-card:nth-child(2) .project-link { color: var(--color-teal); }
.project-card:nth-child(3) .project-link { color: var(--color-purple); }

.project-card .project-link .arrow {
  display: inline-block;
  transition: transform var(--transition);
}

.project-card:hover .project-link .arrow {
  transform: translateX(5px);
  animation: bounce-right 0.4s ease;
}

[dir="rtl"] .project-card:hover .project-link .arrow {
  transform: translateX(-5px);
  animation: bounce-left 0.4s ease;
}

@keyframes bounce-right {
  0%, 100% { transform: translateX(5px); }
  50% { transform: translateX(8px); }
}

@keyframes bounce-left {
  0%, 100% { transform: translateX(-5px); }
  50% { transform: translateX(-8px); }
}

/* ===== About Page ===== */
.about-content {
  max-width: 640px;
}

.about-content p {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: 1.25rem;
}

.about-content p:first-of-type {
  font-size: 1.1875rem;
  color: var(--color-text);
  font-weight: 500;
}

.about-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.5rem;
}

.about-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  border: 1px solid var(--color-border);
  border-radius: 99px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: #fff;
  transition: all var(--transition);
}

.about-links a:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
}

.breadcrumb a {
  color: var(--color-text-secondary);
}

.breadcrumb a:hover {
  color: var(--color-accent);
}

.breadcrumb .sep {
  margin: 0 0.5rem;
  color: var(--color-border);
}

/* ===== Project Detail Page ===== */
.project-detail {
  max-width: 640px;
}

.project-detail > p {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
  margin-bottom: 2rem;
}

.feature-list {
  list-style: none;
  padding: 0;
  margin-bottom: 2rem;
}

.feature-list li {
  position: relative;
  padding-left: 1.5rem;
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 0.5rem;
}

[dir="rtl"] .feature-list li {
  padding-left: 0;
  padding-right: 1.5rem;
}

.feature-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-teal);
  font-weight: 700;
}

[dir="rtl"] .feature-list li::before {
  left: auto;
  right: 0;
}

/* ===== CTA Button ===== */
.project-cta {
  margin-top: 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition);
  cursor: pointer;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border: none;
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ===== Footer ===== */
.site-footer {
  border-top: 2px solid transparent;
  border-image: linear-gradient(90deg, var(--color-accent), var(--color-teal), var(--color-purple)) 1;
  padding: 1.5rem;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

/* ===== Responsive ===== */
@media (min-width: 640px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero h1 {
    font-size: 2.75rem;
  }

  .project-card {
    padding: 1.75rem;
    padding-left: 2rem;
  }

  [dir="rtl"] .project-card {
    padding-left: 1.75rem;
    padding-right: 2rem;
  }
}

@media (max-width: 480px) {
  .header-inner {
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  nav {
    gap: 1rem;
  }

  main {
    padding: 2rem 1rem;
  }

  .hero h1 {
    font-size: 1.75rem;
  }
}

/* ===== Profile Photo ===== */
.about-hero {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.profile-photo {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  border: 3px solid var(--color-border);
  box-shadow: var(--shadow-md);
  flex-shrink: 0;
}

@media (max-width: 480px) {
  .about-hero {
    flex-direction: column;
    text-align: center;
    align-items: center;
  }

  .profile-photo {
    width: 90px;
    height: 90px;
  }

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

/* ===== Dark Mode Toggle ===== */
.theme-toggle {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 99px;
  padding: 0.35rem 0.6rem;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  transition: all var(--transition);
  color: var(--color-text-secondary);
}

.theme-toggle:hover {
  border-color: var(--color-accent);
  background: var(--color-surface);
}

/* ===== Language visibility helpers ===== */
[data-lang="en"] [lang="he"],
[data-lang="he"] [lang="en"] {
  display: none;
}