@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap');
@import url('https://fonts.googleapis.com/icon?family=Material+Icons');

:root {
  --md-primary: #0288D1;
  --md-primary-dark: #01579B;
  --md-primary-light: #B3E5FC;
  --md-accent: #29B6F6;
  --md-surface: #FFFFFF;
  --md-on-surface: #212121;
  --md-on-surface-secondary: #757575;
  --md-elevation-1: 0 2px 4px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.08);
  --md-elevation-2: 0 4px 8px rgba(0,0,0,0.14), 0 2px 4px rgba(0,0,0,0.10);
  --md-elevation-4: 0 8px 16px rgba(0,0,0,0.16), 0 4px 8px rgba(0,0,0,0.10);
  --md-elevation-8: 0 8px 24px rgba(0,0,0,0.20), 0 6px 12px rgba(0,0,0,0.12);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  font-family: 'Roboto', sans-serif;
  background: linear-gradient(135deg, #E1F5FE 0%, #B3E5FC 40%, #81D4FA 100%);
  min-height: 100vh;
  overflow: auto;
}

/* TOP APP BAR */
.md-top-bar {
  position: fixed; top: 0; left: 0; right: 0;
  height: 64px;
  background: var(--md-primary-dark);
  box-shadow: var(--md-elevation-4);
  display: flex; align-items: center;
  padding: 0 24px; z-index: 100;
}
.md-top-bar-title {
  color: #fff; font-size: 20px; font-weight: 500;
  letter-spacing: 0.15px; display: flex; align-items: center; gap: 12px;
}
.md-top-bar-title .material-icons { font-size: 28px; }
.md-top-bar-spacer { flex: 1; }
.md-top-bar-user {
  color: rgba(255,255,255,0.85); font-size: 14px;
  display: flex; align-items: center; gap: 8px;
}
.md-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--md-accent);
  display: flex; align-items: center; justify-content: center;
  color: white; font-size: 18px; font-weight: 500;
}

/* MAIN */
.md-main { padding-top: 80px; padding-bottom: 24px; min-height: 100vh; }

/* LOGIN */
.md-login-wrapper {
  display: flex; justify-content: center; align-items: center;
  min-height: calc(100vh - 64px);
}
.md-login-card {
  background: var(--md-surface); border-radius: 16px;
  box-shadow: var(--md-elevation-8);
  padding: 48px 40px; width: 100%; max-width: 380px;
  text-align: center; animation: fadeInUp 0.4s ease;
}
.md-login-icon {
  width: 80px; height: 80px; border-radius: 50%;
  background: linear-gradient(135deg, var(--md-primary) 0%, var(--md-primary-dark) 100%);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 24px; box-shadow: var(--md-elevation-4);
}
.md-login-icon .material-icons { font-size: 40px; color: white; }
.md-login-card h2 {
  font-size: 24px; font-weight: 500;
  color: var(--md-on-surface); margin-bottom: 8px;
}
.md-login-card p {
  font-size: 14px; color: var(--md-on-surface-secondary); margin-bottom: 32px;
}
.md-error-msg {
  background: #FFEBEE; border-left: 4px solid #F44336;
  padding: 12px 16px; border-radius: 4px;
  color: #C62828; font-size: 13px; margin-bottom: 20px; text-align: left;
}

/* TEXT FIELD */
.md-field { position: relative; margin-bottom: 24px; text-align: left; }
.md-field input {
  width: 100%; padding: 16px 48px 16px 16px;
  border: 2px solid #B0BEC5; border-radius: 8px;
  font-size: 16px; font-family: 'Roboto', sans-serif;
  color: var(--md-on-surface); background: #FAFAFA;
  outline: none; transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}
.md-field input:focus {
  border-color: var(--md-primary); background: #FFFFFF;
  box-shadow: 0 0 0 3px rgba(2,136,209,0.15);
}
.md-field input::placeholder { color: #90A4AE; }
.md-field-icon {
  position: absolute; right: 14px; top: 50%;
  transform: translateY(-50%); color: #90A4AE;
  font-size: 20px; font-family: 'Material Icons';
  pointer-events: none;
}
.md-field input:focus ~ .md-field-icon { color: var(--md-primary); }

/* BUTTONS */
.md-btn-row { display: flex; gap: 12px; margin-top: 8px; }
.md-btn-primary {
  flex: 1; padding: 14px;
  background: linear-gradient(135deg, var(--md-primary) 0%, var(--md-primary-dark) 100%);
  color: white; border: none; border-radius: 8px;
  font-size: 15px; font-weight: 500; font-family: 'Roboto', sans-serif;
  letter-spacing: 0.5px; cursor: pointer;
  box-shadow: var(--md-elevation-2); transition: all 0.2s ease;
}
.md-btn-primary:hover {
  background: linear-gradient(135deg, #039BE5 0%, #0277BD 100%);
  box-shadow: var(--md-elevation-4); transform: translateY(-1px);
}
.md-btn-primary:active { transform: translateY(0); box-shadow: var(--md-elevation-1); }
.md-btn-secondary {
  padding: 14px 20px;
  background: transparent; color: #90A4AE;
  border: 2px solid #B0BEC5; border-radius: 8px;
  font-size: 15px; font-family: 'Roboto', sans-serif;
  cursor: pointer; transition: all 0.2s;
}
.md-btn-secondary:hover { background: #F5F5F5; border-color: #90A4AE; }

/* DASHBOARD */
.md-dashboard { max-width: 1200px; margin: 0 auto; padding: 24px; }
.md-dashboard-header { margin-bottom: 28px; }
.md-dashboard-header h1 {
  font-size: 28px; font-weight: 500;
  color: var(--md-primary-dark); margin-bottom: 4px;
}
.md-dashboard-header p { font-size: 14px; color: var(--md-on-surface-secondary); }
.md-section-title {
  font-size: 12px; font-weight: 500;
  text-transform: uppercase; letter-spacing: 1.5px;
  color: var(--md-on-surface-secondary); margin-bottom: 16px;
  padding-bottom: 8px; border-bottom: 1px solid #E3F2FD;
}
.md-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px; margin-bottom: 32px; animation: fadeIn 0.5s ease;
}

/* MODULE CARD */
.md-module-card {
  background: var(--md-surface); border-radius: 12px;
  box-shadow: var(--md-elevation-1); text-decoration: none;
  color: var(--md-on-surface); display: flex; flex-direction: column;
  align-items: center; padding: 28px 16px 20px;
  transition: all 0.25s ease; border: 2px solid transparent;
  position: relative; overflow: hidden;
}
.md-module-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--md-primary) 0%, var(--md-accent) 100%);
  opacity: 0; transition: opacity 0.25s;
}
.md-module-card:hover {
  box-shadow: var(--md-elevation-4); transform: translateY(-4px);
  border-color: var(--md-primary-light);
}
.md-module-card:hover::before { opacity: 1; }
.md-module-icon-wrap {
  width: 68px; height: 68px; border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 14px;
  background: linear-gradient(135deg, #E3F2FD 0%, #B3E5FC 100%);
  transition: all 0.25s;
}
.md-module-card:hover .md-module-icon-wrap {
  background: linear-gradient(135deg, var(--md-primary) 0%, var(--md-primary-dark) 100%);
}
.md-module-icon-wrap img {
  width: 38px; height: 38px; object-fit: contain; transition: filter 0.25s;
}
.md-module-card:hover .md-module-icon-wrap img { filter: brightness(0) invert(1); }
.md-module-label {
  font-size: 12.5px; font-weight: 500;
  text-align: center; color: var(--md-on-surface); line-height: 1.4;
}

/* LOGOUT */
.md-logout-card {
  background: #FFF8E1; border: 2px solid #FFE082;
  border-radius: 12px; text-decoration: none; color: #E65100;
  display: flex; flex-direction: column; align-items: center;
  padding: 28px 16px 20px; transition: all 0.25s ease;
}
.md-logout-card:hover {
  background: #FFE082; box-shadow: var(--md-elevation-2);
  transform: translateY(-2px);
}
.md-logout-icon-wrap {
  width: 68px; height: 68px; border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 14px; background: #FFE082; transition: background 0.25s;
}
.md-logout-card:hover .md-logout-icon-wrap { background: #FF6D00; }
.md-logout-icon-wrap img {
  width: 38px; height: 38px; object-fit: contain; transition: filter 0.25s;
}
.md-logout-card:hover .md-logout-icon-wrap img { filter: brightness(0) invert(1); }
.md-logout-label {
  font-size: 12.5px; font-weight: 500; text-align: center; line-height: 1.4;
}

/* ANIMATIONS */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; } to { opacity: 1; }
}

/* FOOTER */
.md-footer {
  text-align: center; padding: 20px;
  color: rgba(1,87,155,0.55); font-size: 12px;
}

/* RESPONSIVE */
@media (max-width: 600px) {
  .md-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .md-dashboard { padding: 16px; }
  .md-login-card { padding: 32px 20px; margin: 16px; }
  .md-top-bar { padding: 0 16px; }
  .md-top-bar-title span:last-child { font-size: 15px; }
}