/* =============================================
   Portfolio - Seyed Sadra Razavi Zadeh
   Dark / Light Theme + RTL/LTR Support
   ============================================= */

:root {
  --bg-primary: #0f0f12;
  --bg-secondary: #1a1a22;
  --bg-card: #22222e;
  --bg-card-hover: #2a2a38;
  --text-primary: #f0f0f5;
  --text-secondary: #a0a0b8;
  --text-muted: #6b6b80;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.35);
  --gradient-start: #6366f1;
  --gradient-end: #a855f7;
  --border: rgba(255, 255, 255, 0.08);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --nav-bg: rgba(15, 15, 18, 0.85);
  --success: #22c55e;
  --error: #ef4444;
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.3s ease;
  --font-en: 'Inter', sans-serif;
  --font-fa: 'Vazirmatn', sans-serif;
}

[data-theme="light"] {
  --bg-primary: #f8f9fc;
  --bg-secondary: #eef0f6;
  --bg-card: #ffffff;
  --bg-card-hover: #f0f2f8;
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a68;
  --text-muted: #8888a0;
  --accent: #4f46e5;
  --accent-hover: #6366f1;
  --accent-glow: rgba(79, 70, 229, 0.2);
  --border: rgba(0, 0, 0, 0.08);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  --nav-bg: rgba(248, 249, 252, 0.9);
}

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-en);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
}

body[dir="rtl"] {
  font-family: var(--font-fa);
}

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

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

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- Navbar ---- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  transition: all var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: var(--bg-card);
}

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

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-card);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
  font-size: 1.1rem;
}

.icon-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--bg-card-hover);
}

.lang-btn {
  width: auto;
  padding: 0 14px;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: inherit;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ---- Hero ---- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 70px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 20px;
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
}

.hero h1 .gradient-text {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow);
}

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

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}

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

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-avatar {
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 6rem;
  position: relative;
  box-shadow: 0 0 60px var(--accent-glow);
}

.hero-avatar::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  z-index: -1;
  opacity: 0.3;
  animation: spin 8s linear infinite;
}

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

.hero-avatar i {
  font-size: 5rem;
  color: #fff;
}

.skill-icon i {
  color: var(--accent);
  font-size: 1.5rem;
}

.project-image i {
  color: var(--accent);
  font-size: 3rem;
  opacity: 0.85;
}

.contact-item .icon i {
  color: var(--accent);
  font-size: 1.2rem;
}

.footer .social-links i {
  font-size: 1.1rem;
}

.admin-header h1 i,
.login-box h2 i {
  margin-inline-end: 10px;
  color: var(--accent);
}

.feedback-item .email i {
  margin-inline-end: 6px;
}

.empty-state .icon i {
  font-size: 3rem;
  color: var(--text-muted);
  opacity: 0.6;
}

/* ---- Section Common ---- */
section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-tag {
  display: inline-block;
  padding: 4px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 12px;
}

.section-header p {
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
}

/* ---- About ---- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  transition: all var(--transition);
}

.stat-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: var(--shadow);
}

.stat-card .number {
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-card .label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ---- Skills ---- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.skill-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.skill-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gradient-start), var(--gradient-end));
  opacity: 0;
  transition: opacity var(--transition);
}

.skill-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  box-shadow: var(--shadow);
}

.skill-card:hover::before {
  opacity: 1;
}

.skill-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
}

.skill-card h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
}

.skill-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-tags span {
  padding: 4px 12px;
  background: var(--bg-secondary);
  border-radius: 6px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ---- Projects ---- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
}

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

.project-image {
  height: 200px;
  background: linear-gradient(135deg, var(--bg-secondary), var(--bg-card));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  border-bottom: 1px solid var(--border);
}

.project-body {
  padding: 24px;
}

.project-body h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.project-body p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.project-links {
  display: flex;
  gap: 12px;
}

.project-links a {
  font-size: 0.85rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 6px;
  background: var(--bg-secondary);
  color: var(--accent);
  transition: all var(--transition);
}

.project-links a:hover {
  background: var(--accent);
  color: #fff;
}

/* ---- Contact / Feedback ---- */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
}

.contact-item:hover {
  border-color: var(--accent);
}

.contact-item .icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.contact-item h4 {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.contact-item p {
  font-size: 0.95rem;
}

.feedback-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent);
}

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

.form-message {
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  margin-bottom: 16px;
  display: none;
}

.form-message.success {
  display: block;
  background: rgba(34, 197, 94, 0.1);
  color: var(--success);
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.form-message.error {
  display: block;
  background: rgba(239, 68, 68, 0.1);
  color: var(--error);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

/* ---- Footer ---- */
.footer {
  padding: 40px 0;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer .social-links {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 16px;
}

.footer .social-links a {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.footer .social-links a:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ---- Admin Page ---- */
.admin-page {
  min-height: 100vh;
  padding: 40px 0;
}

.admin-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
  flex-wrap: wrap;
  gap: 16px;
}

.admin-header h1 {
  font-size: 1.8rem;
}

.login-box {
  max-width: 420px;
  margin: 120px auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.login-box h2 {
  text-align: center;
  margin-bottom: 24px;
}

.feedback-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.feedback-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: all var(--transition);
}

.feedback-item:hover {
  border-color: var(--accent);
}

.feedback-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  flex-wrap: wrap;
  gap: 8px;
}

.feedback-item-header .name {
  font-weight: 600;
  font-size: 1.05rem;
}

.feedback-item-header .date {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.feedback-item .type-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.type-badge.comment {
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent);
}

.type-badge.suggestion {
  background: rgba(168, 85, 247, 0.15);
  color: #a855f7;
}

.feedback-item .email {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.feedback-item .message {
  color: var(--text-secondary);
  line-height: 1.6;
}

.feedback-actions {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

.btn-sm {
  padding: 6px 14px;
  font-size: 0.8rem;
  border-radius: 6px;
}

.btn-danger {
  background: rgba(239, 68, 68, 0.1);
  color: var(--error);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
  background: var(--error);
  color: #fff;
}

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.empty-state .icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.stats-bar {
  display: flex;
  gap: 16px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.stats-bar .stat {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 24px;
  flex: 1;
  min-width: 140px;
}

.stats-bar .stat .value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
}

.stats-bar .stat .label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ---- Responsive ---- */
@media (max-width: 968px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-visual {
    order: -1;
  }

  .hero-avatar {
    width: 220px;
    height: 220px;
    font-size: 4rem;
  }

  .about-grid,
  .contact-wrapper {
    grid-template-columns: 1fr;
  }

  .skills-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--nav-bg);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    padding: 16px;
  }

  .nav-links.open {
    display: flex;
  }

  .hamburger {
    display: flex;
  }

  .about-stats {
    grid-template-columns: 1fr;
  }
}