/* ==========================================================================
   Systems Architect & Tech Lead Portfolio Styling
   ========================================================================== */

:root {
  --bg-color: #0b0f19;
  --bg-secondary: #111827;
  --bg-card: #1f293d;
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --accent-color: #10b981;
  --accent-hover: #059669;
  --border-color: rgba(255, 255, 255, 0.1);
  --navbar-bg: rgba(11, 15, 25, 0.92);
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, 0.6);
  --font-mono: 'Fira Code', monospace;
  --font-sans: 'Inter', "Helvetica Neue", Helvetica, Arial, sans-serif;
}

body.light-mode {
  --bg-color: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --accent-color: #059669;
  --accent-hover: #047857;
  --border-color: #e2e8f0;
  --navbar-bg: rgba(255, 255, 255, 0.95);
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, 0.08);
}

html {
  width: 100%;
  height: 100%;
  scroll-behavior: smooth;
}

section, header, footer {
  scroll-margin-top: 70px;
}

body {
  width: 100%;
  height: 100%;
  font-family: var(--font-sans);
  color: var(--text-primary);
  background-color: var(--bg-color);
  transition: background-color 0.3s ease, color 0.3s ease;
  line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 25px;
  font-family: var(--font-sans);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

p {
  margin: 0 0 20px;
  font-size: 18px;
  color: var(--text-secondary);
}

a {
  color: var(--accent-color);
  transition: all 0.2s ease-in-out;
}

a:hover, a:focus {
  text-decoration: none;
  color: var(--accent-hover);
}

/* Navbar Styling */
.navbar-custom {
  margin-bottom: 0;
  border-bottom: 1px solid var(--border-color);
  font-family: var(--font-sans);
  background-color: var(--navbar-bg);
  backdrop-filter: blur(8px);
  padding: 12px 0;
  transition: all 0.3s ease;
}

.navbar-custom .navbar-brand {
  font-weight: 700;
  color: var(--text-primary);
  font-size: 18px;
  letter-spacing: -0.5px;
}

.navbar-custom .navbar-brand i {
  color: var(--accent-color);
  margin-right: 6px;
}

.navbar-custom .nav li a {
  color: var(--text-primary);
  font-weight: 500;
  font-size: 14px;
  padding: 10px 15px;
  border-radius: 6px;
  transition: all 0.2s ease;
}

.navbar-custom .nav li a:hover,
.navbar-custom .nav li a:focus {
  color: var(--accent-color);
  background-color: transparent;
}

.navbar-custom .nav li.active a {
  color: var(--accent-color);
  background-color: rgba(16, 185, 129, 0.1);
}

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

.navbar-items-aligned {
  display: flex;
  align-items: center;
}

@media (max-width: 767px) {
  .navbar-items-aligned {
    display: block;
  }
  .theme-toggle-li {
    margin-top: 10px;
    padding-left: 15px;
  }
}

/* Theme Toggle Button */
.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  margin-left: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s ease;
  box-shadow: var(--shadow-sm);
}

.theme-toggle-btn:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
  transform: translateY(-1px);
}

body:not(.light-mode) .theme-icon-light {
  display: none;
}

body.light-mode .theme-icon-dark {
  display: none;
}

/* Intro Header */
.intro {
  display: table;
  width: 100%;
  padding: 140px 0 80px;
  text-align: center;
  background: var(--bg-color);
  position: relative;
  overflow: hidden;
}

.intro::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(circle at 50% 20%, rgba(16, 185, 129, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.tech-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: 30px;
  color: var(--accent-color);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 24px;
}

.intro .brand-heading {
  font-size: 48px;
  font-weight: 800;
  letter-spacing: -1px;
  color: var(--text-primary);
  margin-bottom: 20px;
}

@media (min-width: 768px) {
  .intro .brand-heading {
    font-size: 72px;
  }
}

.intro .intro-text {
  font-size: 20px;
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto 35px;
}

.author-sub {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--accent-color);
}

.btn-circle {
  display: inline-block;
  width: 80px;
  height: 80px;
  padding: 4px;
  border: 2px solid var(--accent-color);
  border-radius: 50% !important;
  transition: transform 0.3s ease, border-color 0.3s ease;
  position: relative;
}

.btn-circle:hover {
  transform: scale(1.08);
  border-color: var(--accent-hover);
}

.profile-img-btn {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.btn-circle i {
  position: absolute;
  bottom: -28px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--accent-color);
  font-size: 20px;
}

/* Content Sections */
.content-section {
  padding: 80px 0;
  border-bottom: 1px solid var(--border-color);
}

/* Portfolio Cards */
.portfolio-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
  margin-top: 40px;
}

.portfolio-item {
  flex: 1 1 320px;
  max-width: 380px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 20px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.portfolio-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-color);
}

.portfolio-item .item-title {
  font-size: 18px;
  margin-bottom: 16px;
}

.portfolio-item .item-title a {
  color: var(--text-primary);
}

.portfolio-item .item-title a:hover {
  color: var(--accent-color);
}

.portfolio-iframe {
  width: 100%;
  height: 280px;
  border: none;
  border-radius: 8px;
  background: var(--bg-secondary);
}

.soundcloud-wrapper {
  margin-top: 40px;
  background: var(--bg-card);
  padding: 16px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
}

/* Experience List */
.experience-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 30px;
  margin-bottom: 30px;
  text-align: left;
  box-shadow: var(--shadow-sm);
}

.experience-card h4 {
  color: var(--accent-color);
  margin-bottom: 16px;
  font-size: 20px;
}

.skills-badge-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0;
  list-style: none;
  margin-top: 15px;
}

.skills-badge-list li {
  background: rgba(16, 185, 129, 0.1);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: 20px;
  font-family: var(--font-mono);
  font-size: 13px;
}

.experience-card ul {
  padding-left: 20px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.experience-card ul li {
  margin-bottom: 8px;
}

/* Buttons */
.btn-default {
  border: 1px solid var(--accent-color);
  color: var(--accent-color);
  background-color: transparent;
  border-radius: 8px;
  padding: 10px 24px;
  font-weight: 600;
}

.btn-default:hover,
.btn-default:focus {
  border: 1px solid var(--accent-hover);
  color: #ffffff;
  background-color: var(--accent-hover);
}

footer {
  padding: 40px 0;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 14px;
}