/* ============================================
   Hijrah Assalam — Design System
   Modern, Professional, Dark/Light Theme
   ============================================ */

/* CSS Custom Properties */
:root {
  --bg-primary: #020617;
  --bg-secondary: #0f172a;
  --bg-tertiary: #1e293b;
  --bg-glass: rgba(15, 23, 42, 0.6);
  --border-default: rgba(148, 163, 184, 0.1);
  --border-hover: rgba(56, 189, 248, 0.3);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #38bdf8;
  --accent-dim: #0ea5e9;
  --accent-glow: rgba(56, 189, 248, 0.15);
  --success: #34d399;
  --warning: #fbbf24;
  --danger: #f87171;
  --font-sans: 'Inter', ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
  color-scheme: dark;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

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

/* Background Pattern */
.bg-grid {
  background-image:
    radial-gradient(circle at 1px 1px, rgba(148,163,184,0.07) 1px, transparent 0);
  background-size: 32px 32px;
}

.bg-dot {
  background-image: radial-gradient(rgba(148,163,184,0.15) 1px, transparent 1px);
  background-size: 24px 24px;
}

/* Gradient Orbs */
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.15;
  pointer-events: none;
  animation: orbFloat 20s ease-in-out infinite;
}

.orb-1 {
  width: 600px;
  height: 600px;
  background: linear-gradient(135deg, #38bdf8, #818cf8);
  top: -200px;
  right: -100px;
  animation-delay: 0s;
}

.orb-2 {
  width: 500px;
  height: 500px;
  background: linear-gradient(135deg, #34d399, #38bdf8);
  bottom: -150px;
  left: -100px;
  animation-delay: -7s;
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -30px) scale(1.05); }
  66% { transform: translate(-20px, 20px) scale(0.95); }
}

/* Glass Card */
.glass {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-default);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass:hover {
  border-color: var(--border-hover);
  box-shadow: 0 0 30px var(--accent-glow);
  transform: translateY(-2px);
}

/* Section Label */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.section-label::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--accent);
  opacity: 0.5;
}

/* Navigation */
.nav-link {
  position: relative;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s;
  padding: 0.5rem 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* Button Styles */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--bg-primary);
  background: linear-gradient(135deg, var(--accent), var(--accent-dim));
  border-radius: 0.625rem;
  border: none;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  text-decoration: none;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 40px -10px rgba(56, 189, 248, 0.4);
}

.btn-primary:hover::before { opacity: 1; }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  background: transparent;
  border: 1px solid var(--border-default);
  border-radius: 0.625rem;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
}

.btn-secondary:hover {
  border-color: var(--border-hover);
  background: var(--accent-glow);
  transform: translateY(-2px);
}

/* Status Badge */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.875rem;
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: 9999px;
  border: 1px solid rgba(52, 211, 153, 0.2);
  background: rgba(52, 211, 153, 0.08);
  color: var(--success);
}

.status-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

/* Skill Tag */
.skill-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.375rem 0.875rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: rgba(30, 41, 59, 0.6);
  border: 1px solid var(--border-default);
  border-radius: 0.375rem;
  transition: all 0.2s;
}

.skill-tag:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
}

/* Reveal Animation */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* Mobile Menu */
.mobile-menu {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-in-out;
}

.mobile-menu.open {
  max-height: 300px;
}

/* Profile Image */
.profile-container {
  position: relative;
  width: 220px;
  height: 220px;
}

.profile-ring {
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #818cf8, #34d399);
  padding: 4px;
  animation: ringRotate 8s linear infinite;
}

.profile-ring-inner {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: var(--bg-primary);
}

.profile-img {
  position: absolute;
  inset: 4px;
  width: calc(100% - 8px);
  height: calc(100% - 8px);
  border-radius: 50%;
  object-fit: cover;
}

@keyframes ringRotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Contact Form */
.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.9375rem;
  font-family: var(--font-sans);
  color: var(--text-primary);
  background: var(--bg-secondary);
  border: 1px solid var(--border-default);
  border-radius: 0.5rem;
  transition: all 0.2s;
  outline: none;
}

.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-input::placeholder {
  color: var(--text-muted);
}

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

/* Form Messages */
.form-success, .form-error {
  padding: 1rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  display: none;
}

.form-success.show, .form-error.show {
  display: block;
}

.form-success {
  background: rgba(52, 211, 153, 0.1);
  border: 1px solid rgba(52, 211, 153, 0.3);
  color: var(--success);
}

.form-error {
  background: rgba(248, 113, 113, 0.1);
  border: 1px solid rgba(248, 113, 113, 0.3);
  color: var(--danger);
}

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

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

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

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

/* Selection */
::selection {
  background: rgba(56, 189, 248, 0.2);
  color: var(--text-primary);
}

/* Print */
@media print {
  .no-print { display: none !important; }
  body { background: white; color: black; }
  .orb { display: none; }
  .glass { background: white; border: 1px solid #e5e7eb; }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
  .orb { animation: none; }
  .profile-ring { animation: none; }
  .status-badge::before { animation: none; }
}

/* Responsive */
@media (max-width: 640px) {
  .orb { display: none; }
  .profile-container { width: 160px; height: 160px; }
}