/* ═══════════════════════════════════════════════════════════════
   PORTFOLIO PRO — CSS Design System
   Abdulrahman Asami | abdulrahmanasami.com
   Author: Titan-Architect | v2.0 Professional Build
═══════════════════════════════════════════════════════════════ */

/* ─── DESIGN TOKENS ─── */
:root {
  /* Color Palette */
  --color-brand: #0ea5e9;          /* Sky Blue - primary accent */
  --color-brand-dark: #0284c7;
  --color-brand-light: #38bdf8;
  --color-accent: #f97316;         /* Orange - technical energy */
  --color-success: #22c55e;
  --color-warning: #f59e0b;

  /* Dark Theme (default) */
  --bg-base: #070b14;
  --bg-surface: #0d1424;
  --bg-card: #111929;
  --bg-card-hover: #162035;
  --bg-glass: rgba(13, 20, 36, 0.85);
  --border-color: rgba(14, 165, 233, 0.15);
  --border-hover: rgba(14, 165, 233, 0.45);

  --text-primary: #f0f6ff;
  --text-secondary: #8fa3bf;
  --text-muted: #506070;
  --text-link: #38bdf8;

  /* Gradients */
  --gradient-brand: linear-gradient(135deg, #0ea5e9 0%, #6366f1 100%);
  --gradient-hero: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(14,165,233,0.12) 0%, transparent 70%);
  --gradient-card: linear-gradient(135deg, rgba(14,165,233,0.05) 0%, rgba(99,102,241,0.05) 100%);

  /* Typography */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Space Grotesk', var(--font-body);
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;

  /* Sizes */
  --sidebar-width: 260px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 32px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.5);
  --shadow-brand: 0 0 40px rgba(14,165,233,0.15);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 600ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme */
body.light-mode {
  --bg-base: #f8fafc;
  --bg-surface: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --bg-glass: rgba(255, 255, 255, 0.92);
  --border-color: rgba(14, 165, 233, 0.2);
  --border-hover: rgba(14, 165, 233, 0.5);
  --text-primary: #0f1f33;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --gradient-hero: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(14,165,233,0.08) 0%, transparent 70%);
  --shadow-md: 0 8px 32px rgba(0,0,0,0.1);
  --shadow-brand: 0 0 40px rgba(14,165,233,0.1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 0;
}

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

/* ─── ACCESSIBILITY ─── */
:focus-visible {
  outline: 2px solid var(--color-brand);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.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;
}

/* Skip to content */
a[href="#main-content"]:focus {
  position: fixed;
  top: 1rem; left: 1rem;
  z-index: 9999;
  padding: 0.75rem 1.5rem;
  background: var(--color-brand);
  color: #fff;
  border-radius: var(--radius-md);
  font-weight: 600;
  text-decoration: none;
}

/* ─── TYPOGRAPHY ─── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}

a {
  color: var(--text-link);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover { color: var(--color-brand-light); }

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

/* ═══════════════════════════════════════════════════════════════
   LOADER
═══════════════════════════════════════════════════════════════ */
#site-loader {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: var(--bg-base);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}
#site-loader.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}
.loader-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 80px; height: 80px;
}
.loader-rings { position: absolute; inset: 0; }
.ring {
  position: absolute;
  border-radius: 50%;
  border: 2px solid transparent;
  animation: spin-ring 1.4s linear infinite;
}
.r1 { inset: 0; border-top-color: var(--color-brand); animation-duration: 1.4s; }
.r2 { inset: 10px; border-right-color: var(--color-accent); animation-duration: 1s; animation-direction: reverse; }
.r3 { inset: 20px; border-bottom-color: #6366f1; animation-duration: 1.8s; }
.loader-initials {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 800;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
@keyframes spin-ring {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ═══════════════════════════════════════════════════════════════
   SIDEBAR NAVIGATION
═══════════════════════════════════════════════════════════════ */
#sidebar {
  position: fixed;
  left: 0; top: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-surface);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 2rem 1.25rem;
  z-index: 1000;
  transition: transform var(--transition-base), background var(--transition-slow);
  overflow-y: auto;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding-bottom: 2rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
}
.brand-initials {
  width: 44px; height: 44px;
  border-radius: var(--radius-md);
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.1rem;
  color: #fff;
  flex-shrink: 0;
  box-shadow: 0 4px 16px rgba(14,165,233,0.3);
}
.brand-name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text-primary);
}

.nav-links {
  list-style: none;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.nav-link {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
  position: relative;
  text-decoration: none;
}
.nav-link i {
  font-size: 1.1rem;
  width: 20px;
  text-align: center;
  flex-shrink: 0;
}
.nav-link:hover {
  color: var(--color-brand);
  background: rgba(14, 165, 233, 0.08);
  border-color: var(--border-color);
}
.nav-link.active {
  color: var(--color-brand);
  background: rgba(14, 165, 233, 0.12);
  border-color: rgba(14, 165, 233, 0.3);
  font-weight: 600;
}
.nav-link.active::before {
  content: '';
  position: absolute;
  left: -1.25rem;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 60%;
  background: var(--color-brand);
  border-radius: 0 2px 2px 0;
}

.sidebar-actions {
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* Language Switcher */
.lang-switcher {
  display: flex;
  gap: 0.4rem;
}
.lang-btn {
  flex: 1;
  padding: 0.45rem 0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-body);
}
.lang-btn:hover, .lang-btn.active {
  background: var(--color-brand);
  color: #fff;
  border-color: var(--color-brand);
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.6rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 1.05rem;
  transition: all var(--transition-fast);
  width: 100%;
  font-family: var(--font-body);
}
.theme-toggle:hover {
  background: rgba(14,165,233,0.1);
  color: var(--color-brand);
  border-color: var(--color-brand);
}

/* Mobile Sidebar Toggle */
.sidebar-toggle {
  display: none;
  position: fixed;
  top: 1rem; right: 1rem;
  z-index: 1100;
  width: 44px; height: 44px;
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 8px;
  box-shadow: var(--shadow-md);
}
.sidebar-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-brand);
  border-radius: 2px;
  transition: all var(--transition-base);
}
.sidebar-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.sidebar-toggle.open span:nth-child(2) { opacity: 0; }
.sidebar-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  z-index: 999;
  opacity: 0;
  transition: opacity var(--transition-base);
}
.nav-overlay.active { opacity: 1; display: block; }

/* ═══════════════════════════════════════════════════════════════
   MAIN CONTENT LAYOUT
═══════════════════════════════════════════════════════════════ */
.main-content {
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  transition: margin-left var(--transition-base);
}

/* ═══════════════════════════════════════════════════════════════
   HERO SECTION
═══════════════════════════════════════════════════════════════ */
.hero-section {
  min-height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 5rem 4rem;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.mesh-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(14, 165, 233, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(14, 165, 233, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 40%, transparent 80%);
}

.glowing-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  animation: orb-pulse 8s ease-in-out infinite;
}
.orb-1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(14,165,233,0.12) 0%, transparent 70%);
  top: -10%; right: 10%;
  animation-delay: 0s;
}
.orb-2 {
  width: 350px; height: 350px;
  background: radial-gradient(circle, rgba(99,102,241,0.1) 0%, transparent 70%);
  bottom: 20%; left: 5%;
  animation-delay: -3s;
}
.orb-3 {
  width: 250px; height: 250px;
  background: radial-gradient(circle, rgba(249,115,22,0.07) 0%, transparent 70%);
  top: 40%; right: 30%;
  animation-delay: -6s;
}
@keyframes orb-pulse {
  0%, 100% { transform: scale(1) translateY(0); opacity: 0.7; }
  50% { transform: scale(1.15) translateY(-20px); opacity: 1; }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  border: 1px solid rgba(14,165,233,0.3);
  border-radius: 100px;
  background: rgba(14,165,233,0.08);
  color: var(--color-brand);
  font-size: 0.82rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
  backdrop-filter: blur(10px);
}

.hero-greeting {
  display: block;
  font-size: clamp(1rem, 2vw, 1.15rem);
  font-weight: 400;
  color: var(--text-secondary);
  margin-bottom: 0.25rem;
}
.hero-name {
  display: block;
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  font-family: var(--font-heading);
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--color-brand-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
  line-height: 1.05;
}

.hero-typewriter {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: clamp(1.1rem, 2.5vw, 1.45rem);
  font-weight: 500;
  color: var(--text-secondary);
  margin: 1.25rem 0;
  min-height: 2.5rem;
}
.typed-text {
  color: var(--color-brand);
  font-weight: 600;
  font-family: var(--font-heading);
}
.typed-cursor {
  color: var(--color-brand);
  animation: blink 1s step-end infinite;
  font-weight: 300;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

.hero-tagline {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 55ch;
  margin-bottom: 2rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
}
.btn-primary-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 2rem;
  background: var(--gradient-brand);
  color: #fff !important;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition-base);
  box-shadow: 0 4px 20px rgba(14,165,233,0.35);
  text-decoration: none;
  -webkit-text-fill-color: #fff;
}
.btn-primary-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(14,165,233,0.5);
}
.btn-ghost-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 2rem;
  border: 1px solid var(--border-hover);
  color: var(--text-primary) !important;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition-base);
  text-decoration: none;
  -webkit-text-fill-color: var(--text-primary);
  background: transparent;
}
.btn-ghost-cta:hover {
  background: rgba(14,165,233,0.1);
  border-color: var(--color-brand);
  color: var(--color-brand) !important;
  -webkit-text-fill-color: var(--color-brand);
}

.hero-socials {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.social-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--border-color);
  border-radius: 100px;
  color: var(--text-secondary);
  font-size: 0.82rem;
  transition: all var(--transition-fast);
  text-decoration: none;
  -webkit-text-fill-color: var(--text-secondary);
}
.social-pill:hover {
  border-color: var(--color-brand);
  color: var(--color-brand);
  -webkit-text-fill-color: var(--color-brand);
  background: rgba(14,165,233,0.08);
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
}
.scroll-dot {
  width: 6px; height: 24px;
  border: 2px solid var(--border-color);
  border-radius: 100px;
  position: relative;
  overflow: hidden;
}
.scroll-dot::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 2px; height: 6px;
  background: var(--color-brand);
  border-radius: 2px;
  animation: scroll-bounce 1.8s ease-in-out infinite;
}
@keyframes scroll-bounce {
  0% { top: 2px; opacity: 1; }
  80% { top: 12px; opacity: 0; }
  100% { top: 2px; opacity: 0; }
}

/* ═══════════════════════════════════════════════════════════════
   SECTION SHARED STYLES
═══════════════════════════════════════════════════════════════ */
.section-container {
  padding: var(--space-2xl) 0;
  position: relative;
}
.alt-bg {
  background: var(--bg-surface);
}
.section-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 4rem;
}
.section-header {
  text-align: center;
  margin-bottom: 4rem;
}
.section-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-brand);
  background: rgba(14,165,233,0.1);
  border: 1px solid rgba(14,165,233,0.25);
  padding: 0.35rem 0.9rem;
  border-radius: 100px;
  margin-bottom: 1rem;
}
.section-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  margin-bottom: 1rem;
}
.section-line {
  width: 60px;
  height: 3px;
  background: var(--gradient-brand);
  border-radius: 2px;
  margin: 0 auto;
}

/* Glass Card */
.glass-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: all var(--transition-base);
}
.glass-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-brand);
  transform: translateY(-2px);
}

/* ═══════════════════════════════════════════════════════════════
   ABOUT SECTION
═══════════════════════════════════════════════════════════════ */
.about-grid {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 4rem;
  align-items: start;
}
.profile-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 2rem;
  text-align: center;
  backdrop-filter: blur(20px);
}
.profile-image-wrap {
  position: relative;
  width: 180px;
  height: 180px;
  margin: 0 auto 1.5rem;
}
.profile-img {
  width: 100%; height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--color-brand);
  background: var(--bg-card);
}
.profile-ring {
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  border: 2px dashed rgba(14,165,233,0.3);
  animation: spin-ring 20s linear infinite;
}
.profile-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}
.stat-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.stat-number {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-brand);
  font-family: var(--font-heading);
  line-height: 1;
}
.stat-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 500;
}

.about-content h3 {
  font-size: 1.4rem;
  color: var(--color-brand);
  margin-bottom: 1rem;
}
.about-content p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 2rem;
}

.about-info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.9rem;
  margin-bottom: 2rem;
}
.info-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.info-label {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.info-value {
  font-size: 0.92rem;
  color: var(--text-primary);
  font-weight: 500;
}
.status-available {
  color: var(--color-success);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.status-available::before {
  content: '';
  display: inline-block;
  width: 7px; height: 7px;
  background: var(--color-success);
  border-radius: 50%;
  animation: pulse-dot 2s ease infinite;
}
@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 0 rgba(34,197,94,0.4); }
  50% { box-shadow: 0 0 0 5px rgba(34,197,94,0); }
}

.download-cv-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1.75rem;
  background: var(--gradient-brand);
  color: #fff !important;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9rem;
  transition: all var(--transition-base);
  box-shadow: 0 4px 20px rgba(14,165,233,0.3);
  text-decoration: none;
  -webkit-text-fill-color: #fff;
}
.download-cv-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(14,165,233,0.45);
}

/* ═══════════════════════════════════════════════════════════════
   SKILLS SECTION
═══════════════════════════════════════════════════════════════ */
.skills-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 3rem;
}
.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition-base);
}
.skill-category:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-brand);
}
.skill-cat-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
}
.skill-cat-icon {
  width: 42px; height: 42px;
  border-radius: var(--radius-md);
  background: rgba(14,165,233,0.12);
  border: 1px solid rgba(14,165,233,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--color-brand);
  flex-shrink: 0;
}
.skill-cat-header h3 {
  font-size: 1rem;
  font-weight: 700;
}
.skill-bars { display: flex; flex-direction: column; gap: 1.2rem; }
.skill-bar-item {}
.skill-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
  font-size: 0.88rem;
  font-weight: 500;
}
.skill-track {
  height: 6px;
  background: rgba(14,165,233,0.1);
  border-radius: 100px;
  overflow: hidden;
}
.skill-fill {
  height: 100%;
  width: 0;
  background: var(--gradient-brand);
  border-radius: 100px;
  transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.tech-tags-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}
.tech-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-card);
  transition: all var(--transition-fast);
}
.tech-tag:hover {
  border-color: var(--color-brand);
  color: var(--color-brand);
  background: rgba(14,165,233,0.06);
}

/* ═══════════════════════════════════════════════════════════════
   RESUME SECTION (TIMELINE)
═══════════════════════════════════════════════════════════════ */
.resume-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}
.timeline-col-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 2rem;
  color: var(--text-primary);
}
.timeline-col-title i {
  width: 36px; height: 36px;
  border-radius: var(--radius-md);
  background: rgba(14,165,233,0.12);
  border: 1px solid rgba(14,165,233,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-brand);
  font-size: 1.05rem;
  flex-shrink: 0;
}

.timeline {
  position: relative;
  padding-left: 1.5rem;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-brand), transparent);
  border-radius: 2px;
}
.timeline-item {
  position: relative;
  margin-bottom: 1.5rem;
}
.timeline-dot {
  position: absolute;
  left: -1.5rem;
  top: 1.25rem;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--color-brand);
  border: 2px solid var(--bg-base);
  transform: translateX(-5px);
  box-shadow: 0 0 10px rgba(14,165,233,0.5);
}
.timeline-card {
  padding: 1.5rem;
}
.tl-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
}
.tl-header h4 { font-size: 1rem; font-weight: 700; }
.tl-date {
  font-size: 0.78rem;
  color: var(--color-brand);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  white-space: nowrap;
}
.tl-company {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}
.tl-details {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1rem;
}
.tl-details li {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  padding-left: 0.5rem;
  border-left: 2px solid rgba(14,165,233,0.2);
}
.tl-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.tl-tags span {
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(14,165,233,0.1);
  color: var(--color-brand);
  border: 1px solid rgba(14,165,233,0.2);
}

/* Certifications */
.cert-cards { display: flex; flex-direction: column; gap: 1rem; }
.cert-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem;
}
.cert-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius-md);
  background: rgba(14,165,233,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--color-brand);
  flex-shrink: 0;
}
.cert-info {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.cert-info strong { font-size: 0.9rem; font-weight: 700; }
.cert-info span { font-size: 0.78rem; color: var(--text-muted); }
.cert-id { font-family: var(--font-mono); color: var(--color-brand); }

/* ═══════════════════════════════════════════════════════════════
   PORTFOLIO SECTION
═══════════════════════════════════════════════════════════════ */
.portfolio-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  justify-content: center;
  margin-bottom: 3rem;
}
.filter-btn {
  padding: 0.55rem 1.25rem;
  border: 1px solid var(--border-color);
  border-radius: 100px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-body);
}
.filter-btn:hover {
  border-color: var(--color-brand);
  color: var(--color-brand);
}
.filter-btn.active {
  background: var(--gradient-brand);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 4px 16px rgba(14,165,233,0.3);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
}
.project-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-brand);
  transform: translateY(-4px);
}
.project-card.hidden {
  display: none;
}
.project-img-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
  background: var(--bg-surface);
}
.project-img-wrap img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.project-card:hover .project-img-wrap img {
  transform: scale(1.05);
}
.project-overlay {
  position: absolute;
  inset: 0;
  background: rgba(7,11,20,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-base);
}
.project-card:hover .project-overlay { opacity: 1; }
.overlay-btn {
  width: 50px; height: 50px;
  border-radius: 50%;
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff !important;
  font-size: 1.2rem;
  transform: scale(0.7);
  transition: transform var(--transition-base);
  -webkit-text-fill-color: #fff;
}
.project-card:hover .overlay-btn { transform: scale(1); }

.project-info { padding: 1.25rem; }
.project-cat-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.6rem;
}
.cat-real    { background: rgba(34,197,94,0.12);  color: var(--color-success);  border: 1px solid rgba(34,197,94,0.25); }
.cat-innovative { background: rgba(99,102,241,0.12); color: #818cf8; border: 1px solid rgba(99,102,241,0.25); }
.cat-research { background: rgba(249,115,22,0.12); color: var(--color-accent); border: 1px solid rgba(249,115,22,0.25); }

.project-info h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}
.project-info p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 0.85rem;
}
.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.project-tags span {
  padding: 0.18rem 0.55rem;
  border-radius: var(--radius-sm);
  font-size: 0.72rem;
  font-weight: 600;
  background: rgba(14,165,233,0.08);
  color: var(--color-brand);
  border: 1px solid rgba(14,165,233,0.15);
}

/* ═══════════════════════════════════════════════════════════════
   CONTACT SECTION
═══════════════════════════════════════════════════════════════ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 3rem;
  align-items: start;
}
.contact-intro {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 1.75rem;
}
.contact-cards { display: flex; flex-direction: column; gap: 0.85rem; }
.contact-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
}
.cc-icon {
  width: 42px; height: 42px;
  border-radius: var(--radius-md);
  background: rgba(14,165,233,0.12);
  border: 1px solid rgba(14,165,233,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--color-brand);
  flex-shrink: 0;
}
.cc-body {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.cc-body strong { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); }
.cc-body span { font-size: 0.88rem; color: var(--text-primary); }
.cc-body a {
  color: var(--text-primary);
  text-decoration: none;
  -webkit-text-fill-color: var(--text-primary);
  transition: color var(--transition-fast);
}
.cc-body a:hover {
  color: var(--color-brand);
  -webkit-text-fill-color: var(--color-brand);
}

/* Contact Form */
.contact-form {
  padding: 2rem;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1rem;
}
.form-group label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.form-group input,
.form-group textarea {
  padding: 0.75rem 1rem;
  background: var(--bg-base);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  transition: border-color var(--transition-fast);
  width: 100%;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-brand);
  outline: none;
  box-shadow: 0 0 0 3px rgba(14,165,233,0.15);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); }
.form-group textarea { resize: vertical; min-height: 120px; }
.form-error { font-size: 0.78rem; color: #f87171; }
.btn-submit {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 2rem;
  background: var(--gradient-brand);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  font-family: var(--font-body);
  box-shadow: 0 4px 20px rgba(14,165,233,0.3);
}
.btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(14,165,233,0.45);
}
.form-feedback {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  display: none;
}
.form-feedback.success {
  display: block;
  background: rgba(34,197,94,0.1);
  border: 1px solid rgba(34,197,94,0.25);
  color: var(--color-success);
}
.form-feedback.error {
  display: block;
  background: rgba(248,113,113,0.1);
  border: 1px solid rgba(248,113,113,0.25);
  color: #f87171;
}

/* ═══════════════════════════════════════════════════════════════
   FOOTER
═══════════════════════════════════════════════════════════════ */
.site-footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  padding: 3rem 0;
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 4rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-primary);
}
.footer-tagline { color: var(--text-muted); font-size: 0.88rem; }
.footer-socials {
  display: flex;
  gap: 1rem;
}
.footer-socials a {
  width: 40px; height: 40px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 1rem;
  transition: all var(--transition-fast);
  text-decoration: none;
  -webkit-text-fill-color: var(--text-secondary);
}
.footer-socials a:hover {
  border-color: var(--color-brand);
  color: var(--color-brand);
  -webkit-text-fill-color: var(--color-brand);
  background: rgba(14,165,233,0.08);
}
.footer-copy { font-size: 0.8rem; color: var(--text-muted); }

/* ═══════════════════════════════════════════════════════════════
   SCROLL TO TOP
═══════════════════════════════════════════════════════════════ */
.scroll-top-btn {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 500;
  width: 44px; height: 44px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  color: var(--color-brand);
  font-size: 1.3rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-base);
}
.scroll-top-btn.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.scroll-top-btn:hover {
  background: var(--color-brand);
  color: #fff;
  border-color: var(--color-brand);
}

/* ═══════════════════════════════════════════════════════════════
   AOS (Animate on Scroll) minimal implementation
═══════════════════════════════════════════════════════════════ */
[data-aos] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.4,0,0.2,1), transform 0.7s cubic-bezier(0.4,0,0.2,1);
}
[data-aos="fade-right"]  { transform: translateX(-30px); }
[data-aos="fade-left"]   { transform: translateX(30px); }
[data-aos="fade-down"]   { transform: translateY(-24px); }
[data-aos].aos-animate {
  opacity: 1;
  transform: translate(0, 0);
}

/* ═══════════════════════════════════════════════════════════════
   PROJECT MODAL
═══════════════════════════════════════════════════════════════ */
.glass-modal {
  position: fixed;
  inset: 0;
  margin: auto;
  padding: 0;
  border: none;
  background: transparent;
  width: 100vw;
  height: 100vh;
  z-index: 10000;
}
.glass-modal::backdrop {
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
}
.glass-modal[open] {
  display: flex;
  align-items: center;
  justify-content: center;
  animation: modal-fade-in 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  max-width: 800px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  box-shadow: var(--shadow-lg), 0 0 40px rgba(14, 165, 233, 0.1);
}
.modal-close {
  position: absolute;
  top: 15px;
  right: 15px;
  background: rgba(0, 0, 0, 0.5);
  border: none;
  color: #fff;
  width: 36px;
  height: 36px;
  font-size: 1.2rem;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transition: background 0.2s;
  backdrop-filter: blur(4px);
}
.modal-close:hover {
  background: var(--color-accent);
}
html[dir="rtl"] .modal-close {
  right: auto;
  left: 15px;
}
.modal-body {
  display: flex;
  flex-direction: column;
}
#modal-img {
  width: 100%;
  height: 350px;
  object-fit: cover;
  border-bottom: 1px solid var(--border-color);
}
.modal-text {
  padding: 2rem;
}
.modal-tags {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}
.modal-tags span {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  background: rgba(14, 165, 233, 0.1);
  color: var(--color-brand);
  border-radius: 100px;
  border: 1px solid rgba(14, 165, 233, 0.2);
}
#modal-title {
  font-size: 1.8rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}
#modal-desc {
  color: var(--text-secondary);
  line-height: 1.7;
}

@keyframes modal-fade-in {
  from { opacity: 0; transform: scale(0.95) translateY(20px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

/* RTL support for Arabic */
html[dir="rtl"] #sidebar { left: auto; right: 0; border-right: none; border-left: 1px solid var(--border-color); }
html[dir="rtl"] .main-content { margin-left: 0; margin-right: var(--sidebar-width); }
html[dir="rtl"] .nav-link.active::before { left: auto; right: -1.25rem; border-radius: 2px 0 0 2px; }
html[dir="rtl"] .tl-details li { border-left: none; border-right: 2px solid rgba(14,165,233,0.2); padding-left: 0; padding-right: 0.5rem; }
html[dir="rtl"] .timeline { padding-left: 0; padding-right: 1.5rem; }
html[dir="rtl"] .timeline::before { left: auto; right: 0; }
html[dir="rtl"] .timeline-dot { left: auto; right: -1.5rem; transform: translateX(5px); }

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════════════════════════ */
@media (max-width: 1100px) {
  .about-grid { grid-template-columns: 1fr; }
  .profile-card { max-width: 380px; }
  .skills-grid { grid-template-columns: 1fr; }
  .resume-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  :root { --sidebar-width: 0px; }

  #sidebar {
    transform: translateX(-100%);
    width: 260px;
    box-shadow: var(--shadow-lg);
  }
  #sidebar.open { transform: translateX(0); }
  html[dir="rtl"] #sidebar { transform: translateX(100%); }
  html[dir="rtl"] #sidebar.open { transform: translateX(0); }

  .sidebar-toggle { display: flex; }
  .main-content { margin-left: 0 !important; margin-right: 0 !important; }

  .hero-section { padding: 4rem 1.5rem 3rem; }
  .section-inner { padding: 0 1.5rem; }
  .footer-inner { padding: 0 1.5rem; }

  .hero-cta { flex-direction: column; align-items: flex-start; }
  .about-info-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .timeline-col { margin-bottom: 1rem; }
}

@media (max-width: 480px) {
  .hero-name { font-size: 2.2rem; }
  .section-header h2 { font-size: 1.6rem; }
  .profile-stats { grid-template-columns: repeat(3, 1fr); }
}

/* Print styles for CV download */
@media print {
  #sidebar, .scroll-top-btn, .hero-bg { display: none; }
  .main-content { margin: 0; }
}

/* ═══════════════════════════════════════════════════════════════
   CAD BLUEPRINT PLACEHOLDER (PLATINUM STANDARD)
═══════════════════════════════════════════════════════════════ */
.cad-blueprint-placeholder {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  background-image: 
    linear-gradient(rgba(14, 165, 233, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(14, 165, 233, 0.08) 1px, transparent 1px);
  background-size: 20px 20px;
  background-position: center center;
}

.cad-blueprint-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, transparent 30%, var(--bg-surface) 100%);
  pointer-events: none;
}

.cad-crosshair {
  position: relative;
  width: 90px;
  height: 90px;
  border-radius: 50%;
  border: 1px dashed rgba(14, 165, 233, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: cad-slow-rotate 25s linear infinite;
  z-index: 2;
}

.cad-crosshair::before, .cad-crosshair::after {
  content: '';
  position: absolute;
  background: rgba(14, 165, 233, 0.5);
}
.cad-crosshair::before { width: 100%; height: 1px; }
.cad-crosshair::after { width: 1px; height: 100%; }

.cad-label-wrap {
  position: absolute;
  bottom: 0.8rem;
  left: 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  z-index: 2;
}

.cad-label {
  font-size: 0.72rem;
  color: var(--color-brand-light);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: rgba(14, 165, 233, 0.15);
  padding: 0.2rem 0.6rem;
  border-radius: 2px;
  border-left: 2px solid var(--color-brand);
  backdrop-filter: blur(4px);
}

.cad-status {
  font-size: 0.65rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  display: flex;
  align-items: center;
}

.cad-system-blink {
  display: inline-block;
  width: 6px; height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
  margin-right: 6px;
  animation: blink 1.5s infinite step-end;
}

@keyframes cad-slow-rotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* ═══════════════════════════════════════════════════════════════
   PLATINUM STANDARD: UTILITY CLASSES (Banish Inline Styles)
═══════════════════════════════════════════════════════════════ */
.resume-btn-wrap {
  margin-top: 1.5rem;
}

.resume-cv-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.5rem;
  font-size: 0.95rem;
}

.resume-cv-btn i {
  font-size: 1.2rem;
}

.lab-subtitle {
  color: var(--text-muted);
  margin-top: 1rem;
  font-size: 1.1rem;
  max-width: 600px;
}