/* ===========================================
   MUHAMMAD USMAN | PORTFOLIO STYLESHEET
   Theme: Corporate Navy & Gold
   =========================================== */

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

:root {
  --navy: #0a2540;
  --navy-light: #163b66;
  --navy-dark: #061a30;
  --gold: #c9a961;
  --gold-light: #e0c585;
  --gold-dark: #a88a45;
  --bg: #ffffff;
  --bg-alt: #f7f9fc;
  --text: #1a1a1a;
  --text-muted: #5a6478;
  --border: #e5e9f0;
  --shadow: 0 4px 20px rgba(10, 37, 64, 0.08);
  --shadow-lg: 0 10px 40px rgba(10, 37, 64, 0.12);
  --transition: all 0.3s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3, h4 {
  font-family: 'Playfair Display', Georgia, serif;
  color: var(--navy);
  line-height: 1.2;
}

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

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

.gold {
  color: var(--gold);
}

/* ---------- NAVIGATION ---------- */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: var(--transition);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-family: 'Playfair Display', serif;
  font-size: 28px;
  font-weight: 700;
  color: var(--navy);
}

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

.nav-links {
  display: flex;
  list-style: none;
  gap: 36px;
}

.nav-links a {
  color: var(--navy);
  font-weight: 500;
  font-size: 15px;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gold);
  transition: var(--transition);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 28px;
  color: var(--navy);
  cursor: pointer;
}

/* ---------- HERO ---------- */
.hero {
  min-height: 100vh;
  background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy) 100%);
  color: white;
  display: flex;
  align-items: center;
  position: relative;
  padding: 120px 24px 80px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background: radial-gradient(circle at top right, rgba(201, 169, 97, 0.15), transparent 60%);
  pointer-events: none;
}

.hero-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 60px;
  align-items: center;
  width: 100%;
  position: relative;
}

.hero-eyebrow {
  color: var(--gold);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.hero h1 {
  font-size: clamp(40px, 6vw, 72px);
  color: white;
  margin-bottom: 24px;
  font-weight: 700;
}

.hero-tagline {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 32px;
  max-width: 580px;
}

.hero-credentials {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 36px;
}

.cred-badge {
  background: rgba(201, 169, 97, 0.15);
  border: 1px solid var(--gold);
  color: var(--gold-light);
  padding: 8px 18px;
  border-radius: 30px;
  font-size: 13px;
  font-weight: 500;
}

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

.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 4px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
  text-align: center;
}

.btn-primary {
  background: var(--gold);
  color: var(--navy);
  border-color: var(--gold);
}

.btn-primary:hover {
  background: var(--gold-light);
  border-color: var(--gold-light);
  color: var(--navy);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(201, 169, 97, 0.3);
}

.btn-secondary {
  background: transparent;
  color: white;
  border-color: rgba(255, 255, 255, 0.4);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: white;
  color: white;
  transform: translateY(-2px);
}

.btn-full {
  width: 100%;
  margin-top: 12px;
}

.hero-image {
  display: flex;
  justify-content: center;
}

.image-frame {
  position: relative;
  width: 100%;
  max-width: 360px;
  aspect-ratio: 4/5;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
  border: 3px solid var(--gold);
}

.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.scroll-indicator {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255, 255, 255, 0.6);
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: var(--gold);
  animation: scrollPulse 2s infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

/* ---------- SECTIONS ---------- */
.section {
  padding: 100px 0;
}

.section-alt {
  background: var(--bg-alt);
}

.section-header {
  text-align: center;
  margin-bottom: 70px;
  position: relative;
}

.section-number {
  color: var(--gold);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 3px;
  display: block;
  margin-bottom: 12px;
}

.section-header h2 {
  font-size: clamp(32px, 4vw, 44px);
  margin-bottom: 20px;
}

.section-divider {
  width: 60px;
  height: 3px;
  background: var(--gold);
  margin: 0 auto;
}

/* ---------- ABOUT ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 60px;
  align-items: start;
}

.about-text .lead {
  font-size: 19px;
  color: var(--navy);
  margin-bottom: 20px;
  font-weight: 500;
}

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

.about-text strong {
  color: var(--navy);
  font-weight: 600;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.stat-card {
  background: var(--navy);
  color: white;
  padding: 28px 20px;
  border-radius: 8px;
  text-align: center;
  transition: var(--transition);
  border-top: 3px solid var(--gold);
}

.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.stat-number {
  font-family: 'Playfair Display', serif;
  font-size: 42px;
  color: var(--gold);
  font-weight: 700;
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.85);
  font-weight: 500;
}

/* ---------- SKILLS ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
}

.skill-category {
  background: white;
  padding: 32px 28px;
  border-radius: 8px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border-left: 4px solid var(--gold);
}

.skill-category:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.skill-category h3 {
  font-size: 18px;
  margin-bottom: 18px;
  color: var(--navy);
}

.skill-category ul {
  list-style: none;
}

.skill-category li {
  padding: 8px 0;
  color: var(--text-muted);
  font-size: 14px;
  border-bottom: 1px solid var(--border);
  position: relative;
  padding-left: 18px;
}

.skill-category li::before {
  content: '▸';
  color: var(--gold);
  position: absolute;
  left: 0;
  font-weight: bold;
}

.skill-category li:last-child {
  border-bottom: none;
}

/* ---------- TIMELINE ---------- */
.timeline {
  position: relative;
  max-width: 850px;
  margin: 0 auto;
  padding-left: 40px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--gold);
}

.timeline-item {
  position: relative;
  padding-bottom: 50px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-marker {
  position: absolute;
  left: -34px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--gold);
  border: 3px solid var(--bg);
  box-shadow: 0 0 0 2px var(--gold);
}

.timeline-content {
  background: white;
  padding: 28px 30px;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.timeline-date {
  display: inline-block;
  background: var(--navy);
  color: var(--gold);
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.timeline-content h3 {
  font-size: 22px;
  margin-bottom: 4px;
}

.timeline-content h4 {
  font-family: 'Inter', sans-serif;
  font-size: 15px;
  color: var(--gold-dark);
  font-weight: 600;
  margin-bottom: 14px;
}

.timeline-content p {
  color: var(--text-muted);
  font-size: 15px;
}

/* ---------- PROJECTS ---------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
}

.project-card {
  background: white;
  border-radius: 8px;
  padding: 32px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border-top: 4px solid var(--gold);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.project-header {
  margin-bottom: 16px;
}

.project-tag {
  display: inline-block;
  background: var(--gold);
  color: var(--navy);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.project-card h3 {
  font-size: 22px;
  margin-bottom: 6px;
}

.project-client {
  color: var(--gold-dark);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
}

.project-card > p {
  color: var(--text-muted);
  font-size: 15px;
  flex: 1;
  margin-bottom: 20px;
}

.project-card strong {
  color: var(--navy);
}

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

.project-tags span {
  background: var(--bg-alt);
  color: var(--navy);
  padding: 5px 12px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
  border: 1px solid var(--border);
}

/* ---------- CONTACT ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: start;
}

.contact-info .lead {
  font-size: 18px;
  color: var(--navy);
  font-weight: 500;
  margin-bottom: 32px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

.contact-icon {
  width: 44px;
  height: 44px;
  background: var(--navy);
  color: var(--gold);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.contact-label {
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 2px;
}

.contact-item a, .contact-item span {
  color: var(--navy);
  font-weight: 500;
  font-size: 15px;
}

.contact-form-wrap {
  background: white;
  padding: 40px;
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
  border-top: 4px solid var(--gold);
}

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

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  font-size: 13px;
  color: var(--navy);
  letter-spacing: 0.5px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-family: inherit;
  font-size: 15px;
  background: var(--bg-alt);
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--gold);
  background: white;
  box-shadow: 0 0 0 3px rgba(201, 169, 97, 0.15);
}

.form-note {
  margin-top: 14px;
  font-size: 14px;
  text-align: center;
  min-height: 20px;
}

.form-note.success { color: #16a34a; }
.form-note.error { color: #dc2626; }

/* ---------- FOOTER ---------- */
footer {
  background: var(--navy-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 30px 0;
  text-align: center;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-tagline {
  color: var(--gold);
  font-size: 14px;
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 900px) {
  .hero-content,
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-image {
    order: -1;
  }

  .image-frame {
    max-width: 260px;
  }

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

@media (max-width: 700px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 20px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
  }

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

  .nav-toggle {
    display: block;
  }

  .section {
    padding: 70px 0;
  }

  .contact-form-wrap {
    padding: 28px 20px;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .about-stats {
    grid-template-columns: 1fr;
  }

  .hero-cta {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }
}