/* ============================================================
   KSoM Courses Portal — Premium Design System
   CSS Custom Properties + Open Props (no build step needed)
   ============================================================ */

/* -- Open Props: loaded via @import for design tokens -- */
@import "https://unpkg.com/open-props";
@import "https://unpkg.com/open-props/normalize.min.css";

/* ============================================================
   Brand Tokens
   ============================================================ */
:root {
  --ksom-blue:        #1e3a8a;
  --ksom-blue-mid:    #2563eb;
  --ksom-aqua:        #38bdf8;
  --ksom-dark:        #0f172a;
  --ksom-surface:     #f8fafc;
  --ksom-card-bg:     rgba(255, 255, 255, 0.88);
  --ksom-border:      rgba(203, 213, 225, 0.6);
  --ksom-text-main:   #1e293b;
  --ksom-text-muted:  #64748b;
  --ksom-shadow-soft: 0 4px 24px -4px rgba(30, 58, 138, 0.08);
  --ksom-shadow-card: 0 8px 40px -8px rgba(30, 58, 138, 0.13);
  --ksom-shadow-glow: 0 0 20px rgba(37, 99, 235, 0.25);
  --ksom-radius-card: var(--radius-3);
  --ksom-radius-btn:  var(--radius-2);
  --ksom-gradient:    linear-gradient(135deg, var(--ksom-blue) 0%, var(--ksom-blue-mid) 60%, var(--ksom-aqua) 100%);
  --ksom-gradient-bg: linear-gradient(145deg, #f0f4ff 0%, #e8f0fe 50%, #f0f9ff 100%);
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-serif: 'Merriweather', 'Georgia', serif;
}

/* ============================================================
   Base & Reset
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: var(--font-lineheight-3);
  color: var(--ksom-text-main);
  background: var(--ksom-gradient-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  position: relative;
  overflow-x: hidden;
}

/* Decorator orbs */
body::before, body::after {
  content: '';
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.08;
  filter: blur(80px);
}
body::before {
  width: 480px; height: 480px;
  background: var(--ksom-blue-mid);
  top: -100px; right: -100px;
}
body::after {
  width: 600px; height: 600px;
  background: var(--ksom-aqua);
  bottom: -150px; left: -150px;
}

/* ============================================================
   Typography
   ============================================================ */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  letter-spacing: -0.02em;
  color: var(--ksom-text-main);
  margin-block-start: 0;
}

h1 { font-size: var(--font-size-6); font-weight: 700; }
h2 { font-size: var(--font-size-5); font-weight: 700; }
h3 { font-size: var(--font-size-4); font-weight: 600; }

p { color: var(--ksom-text-muted); margin-block-start: 0; }
a { color: var(--ksom-blue-mid); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ============================================================
   Layout Wrapper
   ============================================================ */
.site-main {
  flex: 1;
  width: 100%;
  max-width: 1152px;
  margin-inline: auto;
  padding: var(--size-9) var(--size-6);
  position: relative;
  z-index: 1;
}

/* ============================================================
   Header
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--ksom-border);
  box-shadow: var(--ksom-shadow-soft);
}

.site-header__inner {
  max-width: 1152px;
  margin-inline: auto;
  padding: var(--size-3) var(--size-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--size-4);
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: var(--size-4);
}

.site-header__logo {
  font-family: var(--font-serif);
  font-size: var(--font-size-5);
  font-weight: 700;
  background: var(--ksom-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.03em;
}

.site-header__divider {
  width: 1px;
  height: 2rem;
  background: var(--ksom-border);
}

.site-header__meta { display: flex; flex-direction: column; gap: 2px; }
.site-header__title  { font-size: var(--font-size-2); font-weight: 600; color: var(--ksom-text-main); font-family: var(--font-sans); }
.site-header__sub    { font-size: var(--font-size-0); color: var(--ksom-text-muted); font-weight: 500; }

.site-header__nav { display: flex; align-items: center; gap: var(--size-4); }
#user-email-display { font-size: var(--font-size-1); font-weight: 500; color: var(--ksom-text-muted); }

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: var(--size-8) var(--size-6);
  border-top: 1px solid var(--ksom-border);
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(10px);
}
.site-footer__inner {
  max-width: 900px;
  margin-inline: auto;
}
.site-footer p { font-size: 0.75rem; margin: var(--size-1) 0; line-height: 1.6; color: #64748b; }
.site-footer .footer-name { font-family: var(--font-serif); font-size: 0.95rem; color: var(--ksom-text-main); font-weight: 700; margin-bottom: var(--size-2); }

/* ============================================================
   Card / Glass Component
   ============================================================ */
.card {
  background: var(--ksom-card-bg);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--ksom-border);
  border-radius: var(--ksom-radius-card);
  box-shadow: var(--ksom-shadow-card);
  padding: var(--size-8);
  position: relative;
  overflow: hidden;
}

.card--accent::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--ksom-gradient);
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--size-2);
  padding: var(--size-3) var(--size-6);
  border-radius: var(--ksom-radius-btn);
  font-size: var(--font-size-1);
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  border: none;
  transition: all 200ms var(--ease-3);
  text-decoration: none;
}

.btn-primary {
  background: var(--ksom-gradient);
  color: #fff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--ksom-shadow-glow);
  text-decoration: none;
  color: #fff;
}

.btn-ghost {
  background: transparent;
  color: var(--ksom-text-muted);
  border: 1px solid var(--ksom-border);
}
.btn-ghost:hover {
  background: rgba(30,58,138,0.05);
  color: var(--ksom-blue-mid);
  text-decoration: none;
}

.btn-danger {
  background: transparent;
  color: #dc2626;
  font-size: var(--font-size-0);
  padding: var(--size-2) var(--size-3);
}
.btn-danger:hover {
  background: #fef2f2;
  text-decoration: none;
}

/* ============================================================
   Login Page
   ============================================================ */
.login-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 65vh;
}

.login-card {
  width: 100%;
  max-width: 440px;
  text-align: center;
}

.login-card h1 {
  font-size: var(--font-size-7);
  background: var(--ksom-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--size-2);
}

.login-card .subtitle {
  font-size: var(--font-size-1);
  margin-bottom: var(--size-9);
  max-width: 300px;
  margin-inline: auto;
  line-height: var(--font-lineheight-4);
}

.login-card .subtitle em { font-style: normal; font-weight: 600; color: var(--ksom-text-main); }

.login-card .google-btn-wrap {
  display: flex;
  justify-content: center;
  min-height: 50px;
  margin-bottom: var(--size-5);
}

.login-card .secure-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--size-2);
  font-size: var(--font-size-0);
  color: var(--ksom-text-muted);
  border-top: 1px solid var(--ksom-border);
  padding-top: var(--size-6);
  margin-top: var(--size-8);
}

.error-box {
  display: none;
  margin-top: var(--size-5);
  background: #fef2f2;
  color: #b91c1c;
  border: 1px solid #fecaca;
  border-radius: var(--radius-2);
  padding: var(--size-3) var(--size-4);
  font-size: var(--font-size-1);
  font-weight: 500;
}

/* ============================================================
   Dashboard Page
   ============================================================ */
.dashboard-header {
  margin-bottom: var(--size-9);
  padding-bottom: var(--size-6);
  border-bottom: 1px solid var(--ksom-border);
}
.dashboard-header h1 { margin-bottom: var(--size-2); }
.dashboard-header p  { font-size: var(--font-size-2); }

.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--size-8);
}

@media (min-width: 960px) {
  .dashboard-grid { grid-template-columns: 2fr 1fr; }
}

/* --- Pending Actions --- */
.actions-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--size-6);
}

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.6rem;
  height: 1.6rem;
  padding: 0 var(--size-2);
  border-radius: var(--radius-round);
  font-size: var(--font-size-0);
  font-weight: 700;
}
.badge-blue { background: rgba(37, 99, 235, 0.1); color: var(--ksom-blue-mid); }

.actions-label {
  font-size: var(--font-size-0);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--ksom-text-muted);
}

.action-list { display: flex; flex-direction: column; gap: var(--size-4); }

.action-item {
  display: flex;
  align-items: center;
  gap: var(--size-4);
  padding: var(--size-4) var(--size-5);
  background: rgba(248, 250, 252, 0.7);
  border: 1px solid var(--ksom-border);
  border-radius: var(--radius-2);
  transition: all 200ms var(--ease-3);
}
.action-item:hover {
  background: #fff;
  box-shadow: var(--ksom-shadow-soft);
  border-color: rgba(37, 99, 235, 0.2);
}

.action-avatar {
  flex-shrink: 0;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: rgba(37, 99, 235, 0.1);
  color: var(--ksom-blue-mid);
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: var(--font-size-3);
  display: grid;
  place-items: center;
  transition: all 200ms var(--ease-3);
}
.action-item:hover .action-avatar {
  background: var(--ksom-blue-mid);
  color: #fff;
}

.action-body { flex: 1; }
.action-body strong { display: block; font-size: var(--font-size-1); font-weight: 600; color: var(--ksom-text-main); }
.action-body span   { font-size: var(--font-size-0); color: var(--ksom-text-muted); }

/* --- Profile Card --- */
.profile-section {
  font-size: var(--font-size-0);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--ksom-text-muted);
  margin-bottom: var(--size-6);
}

.profile-user {
  display: flex;
  align-items: center;
  gap: var(--size-4);
  margin-bottom: var(--size-6);
}

.profile-avatar {
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  background: #e2e8f0;
  border: 2px solid #fff;
  box-shadow: var(--ksom-shadow-soft);
  display: grid;
  place-items: center;
  overflow: hidden;
}
.profile-avatar img { width: 100%; height: 100%; object-fit: cover; display: none; }
.profile-avatar svg { color: #94a3b8; }

.profile-name { font-size: var(--font-size-2); font-weight: 700; color: var(--ksom-text-main); margin: 0; }
.profile-pill {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-round);
  background: #dcfce7;
  color: #15803d;
  margin-top: var(--size-1);
}

.profile-meta {
  border-top: 1px solid var(--ksom-border);
  padding-top: var(--size-4);
  display: flex;
  flex-direction: column;
  gap: var(--size-3);
}
.meta-row { display: flex; justify-content: space-between; font-size: var(--font-size-1); }
.meta-row span:first-child { color: var(--ksom-text-muted); }
.meta-row span:last-child  { font-weight: 600; color: var(--ksom-text-main); }

/* ============================================================
   Animations
   ============================================================ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.card, .action-item {
  animation: fadeInUp 0.4s var(--ease-3) both;
}

/* ============================================================
   Form Elements
   ============================================================ */
.form-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--ksom-text-muted);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: .4rem;
}

.form-input {
  width: 100%;
  padding: .55rem .8rem;
  font-size: .9rem;
  font-family: var(--font-sans);
  color: var(--ksom-text-main);
  background: #fff;
  border: 1px solid var(--ksom-border);
  border-radius: .5rem;
  outline: none;
  transition: border-color 180ms ease, box-shadow 180ms ease;
  appearance: none;
  -webkit-appearance: none;
}

.form-input:focus {
  border-color: var(--ksom-blue-mid);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.form-input[type="number"]::-webkit-inner-spin-button,
.form-input[type="number"]::-webkit-outer-spin-button {
  opacity: 1;
}

/* Select arrow */
select.form-input {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%2364748b' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right .75rem center;
  padding-right: 2.2rem;
}

/* ============================================================
   Responsive tweaks
   ============================================================ */
@media (max-width: 640px) {
  .site-main { padding: 2rem 1rem; }
  .card { padding: 1.25rem; }
  h1 { font-size: 1.6rem; }
}