/* ============================================================
   shared.css — DevOps Portfolio Shared Stylesheet
   Provides CSS custom property-based dark/light theming.
   ============================================================ */

/* ---------- Material Icons ---------- */
.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  display: inline-block;
}

/* ============================================================
   DARK MODE (default — class="dark" on <html>)
   ============================================================ */
html.dark {
  --bg: #0e0e0f;
  --surface: #0e0e0f;
  --surface-container: #1a191b;
  --surface-container-low: #131314;
  --surface-container-high: #201f21;
  --surface-container-highest: #262528;
  --surface-bright: #2c2c2f;
  --on-surface: #e8e4e8;
  --on-surface-variant: #acaaad;
  --primary: #bac3ff;
  --primary-container: #2f3f92;
  --on-primary: #1a1f6e;
  --outline: #767578;
  --outline-variant: #48474a;
  --scrollbar-track: #0e0e0f;
  --scrollbar-thumb: #262528;
  --toggle-bg: #262528;
  --toggle-color: #bac3ff;
  --toggle-border: #48474a;
  --tertiary-container: #d1ddfa;
  --on-tertiary-fixed: #303c53;
  --footer-bg: #0e0e0f;
  --card-shadow: transparent;
}

/* ============================================================
   LIGHT MODE (class="light" on <html>)
   ============================================================ */
html.light {
  --bg: #F9FAFB;
  --surface: #F9FAFB;
  --surface-container: #F3F4F6;
  --surface-container-low: #FFFFFF;
  --surface-container-high: #E5E7EB;
  --surface-container-highest: #D1D5DB;
  --surface-bright: #FFFFFF;
  --on-surface: #111827;
  --on-surface-variant: #4B5563;
  --primary: #2f3f92;
  --primary-container: #E0E7FF;
  --on-primary: #FFFFFF;
  --outline: #9CA3AF;
  --outline-variant: #D1D5DB;
  --scrollbar-track: #F9FAFB;
  --scrollbar-thumb: #D1D5DB;
  --toggle-bg: #FFFFFF;
  --toggle-color: #2f3f92;
  --toggle-border: #D1D5DB;
  --tertiary-container: #DBEAFE;
  --on-tertiary-fixed: #1E293B;
  --footer-bg: #FFFFFF;
  --card-shadow: rgba(0,0,0,0.06);
}

/* ============================================================
   BASE STYLES
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }

body {
  background-color: var(--bg);
  color: var(--on-surface);
  transition: background-color 0.3s ease, color 0.3s ease;
}

::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--scrollbar-track); }
::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 10px; }

/* ============================================================
   UTILITY CLASSES (theme-aware)
   ============================================================ */
.on-surface-text        { color: var(--on-surface); }
.on-surface-variant-text{ color: var(--on-surface-variant); }
.primary-text           { color: var(--primary); }
.outline-color          { color: var(--outline); }

/* Top App Bar */
.top-app-bar {
  background-color: var(--surface);
  border-bottom: 1px solid var(--outline-variant);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}
html.light .top-app-bar {
  background-color: rgba(249, 250, 251, 0.85);
  backdrop-filter: blur(12px);
}

.brand-text   { color: var(--on-surface); }
.version-text { color: var(--primary); font-family: 'Space Grotesk', sans-serif; font-weight: 700; }

/* Navigation links */
.nav-link        { color: var(--on-surface-variant); }
.nav-link.active { color: var(--primary); font-weight: 700; }
.nav-link:hover  { color: var(--on-surface); }

/* Side nav items */
.nav-item {
  color: var(--on-surface-variant);
  border-radius: 9999px;
  transition: background-color 0.3s, color 0.3s;
}
.nav-item:hover {
  background-color: var(--surface-container-low);
  color: var(--on-surface);
}
.nav-item.active {
  background-color: var(--surface-container);
  color: var(--primary);
}
.nav-label-text { color: var(--on-surface-variant); }

/* Cards */
.card {
  background-color: var(--surface-container-low);
  transition: background-color 0.3s ease;
}
html.light .card {
  background-color: #FFFFFF;
  border: 1px solid #F3F4F6;
  box-shadow: 0 1px 4px var(--card-shadow);
}

.service-card {
  background-color: var(--surface-container);
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}
.service-card:hover { background-color: var(--surface-container-high); }
html.light .service-card {
  background-color: #FFFFFF;
  border: 1px solid #F3F4F6;
}
html.light .service-card:hover {
  border-color: rgba(47, 63, 146, 0.2);
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
  background-color: #FFFFFF;
}

.service-icon-bg {
  background-color: var(--surface-container-highest);
}
html.light .service-icon-bg {
  background-color: rgba(47, 63, 146, 0.06);
}

/* Download / CTA Button */
.download-btn {
  background-color: var(--surface-container-highest);
  color: var(--primary);
  transition: background-color 0.2s ease;
}
html.light .download-btn {
  background-color: var(--primary);
  color: #FFFFFF;
}
html.light .download-btn:hover {
  background-color: #1E3A8A;
}

/* Divider */
.divider { background-color: var(--outline-variant); opacity: 0.2; height: 1px; }

/* Footer */
.footer-bg    { background-color: var(--footer-bg); }
.footer-border{ border-color: var(--outline-variant); opacity: 1; }
html.light .footer-border { opacity: 0.5; }
.footer-link  { color: var(--outline); }
.footer-link:hover { color: var(--primary); }

/* Bottom Nav */
.bottom-nav {
  background-color: var(--surface-container-low);
  border-top: 1px solid var(--outline-variant);
}
html.light .bottom-nav {
  background-color: #FFFFFF;
  border-color: #E5E7EB;
}

/* ============================================================
   THEME TOGGLE BUTTON
   ============================================================ */
.theme-toggle-btn {
  background-color: var(--toggle-bg);
  color: var(--toggle-color);
  border: 1px solid var(--toggle-border);
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  transition: all 0.3s ease;
}
.theme-toggle-btn:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.25);
  transform: scale(1.1);
}

/* ============================================================
   RESUME PAGE
   ============================================================ */
.resume-section-header {
  color: var(--on-surface);
  font-family: 'Space Grotesk', sans-serif;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  font-weight: 700;
}
.resume-card {
  background-color: var(--surface-container-low);
  border-radius: 0.5rem;
  padding: 2rem;
}
html.light .resume-card {
  background-color: #FFFFFF;
  border: 1px solid #F3F4F6;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.skill-chip {
  background-color: var(--surface-container-highest);
  color: var(--on-surface-variant);
  padding: 0.375rem 0.75rem;
  border-radius: 9999px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 10px;
}
html.light .skill-chip {
  background-color: #E0E7FF;
  color: #2f3f92;
}

.toolkit-bar-bg {
  background-color: var(--surface-container-highest);
}
.toolkit-bar { background-color: var(--primary); }

.cert-icon-bg {
  background-color: var(--surface-container-highest);
}
html.light .cert-icon-bg {
  background-color: #E0E7FF;
}

/* ============================================================
   PORTFOLIO PAGE
   ============================================================ */
.filter-chip-active {
  background-color: var(--primary);
  color: var(--on-primary);
}
.filter-chip {
  background-color: var(--surface-container);
  color: var(--on-surface-variant);
  transition: color 0.2s ease;
}
.filter-chip:hover { color: var(--on-surface); }
html.light .filter-chip {
  background-color: #F3F4F6;
  border: 1px solid #E5E7EB;
}
html.light .filter-chip:hover {
  background-color: #E5E7EB;
  color: #111827;
}

.project-card-bg {
  background-color: var(--surface-container-low);
}

.project-tag {
  background-color: var(--tertiary-container);
  color: var(--on-tertiary-fixed);
}
html.light .project-tag {
  background-color: #DBEAFE;
  color: #1E3A8A;
}

/* ============================================================
   CONTACT PAGE
   ============================================================ */
.contact-form-bg {
  background-color: var(--surface-container-low);
}
html.light .contact-form-bg {
  background-color: #FFFFFF;
  border: 1px solid #F3F4F6;
  box-shadow: 0 4px 16px rgba(0,0,0,0.06);
}

.form-input {
  width: 100%;
  background-color: var(--surface-container);
  border: none;
  border-bottom: 1px solid var(--outline-variant);
  color: var(--on-surface);
  padding: 1rem 0;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  outline: none;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}
.form-input::placeholder { color: var(--outline-variant); opacity: 0.5; }
.form-input:focus { border-color: var(--primary); }
html.light .form-input { background-color: transparent; }

.form-label {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--outline);
}

.submit-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background-color: var(--surface-container-highest);
  color: var(--primary);
  padding: 1.5rem 2rem;
  border-radius: 0.5rem;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border: none;
  cursor: pointer;
  transition: background-color 0.2s ease;
  position: relative;
  overflow: hidden;
}
.submit-btn:hover { background-color: var(--surface-bright); }
html.light .submit-btn {
  background-color: #2f3f92;
  color: #FFFFFF;
}
html.light .submit-btn:hover { background-color: #1E3A8A; }

.social-node {
  flex: 1;
  min-width: 120px;
  background-color: var(--surface-container-low);
  padding: 1.5rem;
  border-radius: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  color: var(--on-surface-variant);
  transition: background-color 0.3s ease, color 0.3s ease;
  text-decoration: none;
}
.social-node:hover {
  background-color: var(--surface-container-highest);
  color: var(--primary);
}
html.light .social-node {
  background-color: #F3F4F6;
  border: 1px solid #E5E7EB;
}
html.light .social-node:hover {
  background-color: #E0E7FF;
  color: #2f3f92;
}
.social-node-label {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--on-surface);
}

/* ============================================================
   PROJECT OVERLAY (MODAL)
   ============================================================ */
.overlay-backdrop {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.overlay-bg {
  position: absolute;
  inset: 0;
  background-color: rgba(0,0,0,0.75);
  backdrop-filter: blur(12px);
}
.overlay-panel {
  position: relative;
  width: 100%;
  max-width: 56rem;
  max-height: 90vh;
  border-radius: 0.75rem;
  border: 1px solid var(--outline-variant);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: rgba(38, 37, 40, 0.92);
  backdrop-filter: blur(20px);
  box-shadow: 0 25px 60px rgba(0,0,0,0.6);
}
html.light .overlay-panel {
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 25px 60px rgba(0,0,0,0.15);
}
.overlay-hidden { display: none; }

.glass-panel {
  background: rgba(38, 37, 40, 0.6);
  backdrop-filter: blur(20px);
}
.scrollbar-hide::-webkit-scrollbar { display: none; }
.scrollbar-hide { -ms-overflow-style: none; scrollbar-width: none; }

.project-tag-overlay {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background-color: rgba(255,117,32,0.15);
  border: 1px solid rgba(255,117,32,0.25);
  color: #ff7520;
  border-radius: 2px;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
html.light .project-tag-overlay {
  background-color: rgba(255,117,32,0.1);
  color: #c45a00;
}

.log-panel {
  background-color: rgba(0,0,0,0.3);
  border: 1px solid var(--outline-variant);
  border-radius: 0.5rem;
  padding: 1.25rem;
  font-family: monospace;
}
html.light .log-panel {
  background-color: #F8FAFC;
  border: 1px solid #E5E7EB;
}

/* ============================================================
   PAGE TRANSITIONS
   ============================================================ */
main { animation: fadeIn 0.4s ease-out; }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 767px) {
  .top-app-bar { padding: 0 1rem; }
}
