/* ==========================================================================
   SCHOOL MANAGEMENT SYSTEM - PREMIUM UI THEME (Stage 03)
   Mengganti total nuansa visual AdminLTE bawaan menjadi tampilan modern,
   corporate, elegant, dengan dukungan penuh Dark Mode & Light Mode.
   ========================================================================== */

:root {
    --sms-primary: #4361ee;
    --sms-primary-dark: #3a0ca3;
    --sms-radius: 14px;
    --sms-radius-sm: 10px;
    --sms-font: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;

    --sms-bg: #f4f6fb;
    --sms-surface: #ffffff;
    --sms-border: #eaedf5;
    --sms-text-muted: #6b7280;

    --sms-sidebar-from: #12172b;
    --sms-sidebar-to: #1a2138;
    --sms-sidebar-text: rgba(255, 255, 255, 0.75);

    --sms-shadow-sm: 0 2px 10px rgba(20, 24, 40, 0.05);
    --sms-shadow-md: 0 8px 24px rgba(20, 24, 40, 0.08);
}

[data-bs-theme="dark"] {
    --sms-bg: #0d1017;
    --sms-surface: #151a24;
    --sms-border: #232936;
    --sms-text-muted: #9aa3b2;

    --sms-sidebar-from: #0b0e17;
    --sms-sidebar-to: #12172a;

    --sms-shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.35);
    --sms-shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);
}

* { scrollbar-width: thin; }

html, body {
    font-family: var(--sms-font);
    background-color: var(--sms-bg);
    transition: background-color .2s ease;
}

.app-content, .app-content-header, .app-main { background-color: var(--sms-bg); }

/* ==========================================================================
   PAGE LOADER (Loading Animation)
   ========================================================================== */
#sms-page-loader {
    position: fixed; inset: 0; z-index: 20000;
    background: var(--sms-bg);
    display: flex; align-items: center; justify-content: center;
    transition: opacity .35s ease, visibility .35s ease;
}
#sms-page-loader.sms-hide { opacity: 0; visibility: hidden; pointer-events: none; }

.sms-loader-spinner {
    width: 46px; height: 46px; border-radius: 50%;
    border: 4px solid rgba(67, 97, 238, 0.15);
    border-top-color: var(--sms-primary);
    animation: sms-spin .8s linear infinite;
}
@keyframes sms-spin { to { transform: rotate(360deg); } }

#sms-topbar-loader {
    position: fixed; top: 0; left: 0; right: 0; height: 3px; z-index: 20001;
    background: transparent; pointer-events: none;
}
.sms-topbar-loader-bar {
    height: 100%; width: 0%;
    background: linear-gradient(90deg, var(--sms-primary), var(--sms-primary-dark));
    box-shadow: 0 0 8px var(--sms-primary);
    transition: width .3s ease, opacity .3s ease;
}

/* ==========================================================================
   SIDEBAR PREMIUM
   ========================================================================== */
.sms-sidebar {
    background: linear-gradient(180deg, var(--sms-sidebar-from) 0%, var(--sms-sidebar-to) 100%) !important;
    border-right: none;
    display: flex;
    flex-direction: column;
}

.sms-sidebar .sidebar-brand { border-bottom: 1px solid rgba(255, 255, 255, 0.08); }

.sms-brand-icon {
    width: 34px; height: 34px; border-radius: 10px;
    background: linear-gradient(135deg, var(--sms-primary), var(--sms-primary-dark));
    display: flex; align-items: center; justify-content: center; color: #fff;
    font-size: .95rem;
}

.sms-sidebar .sidebar-wrapper { flex: 1; overflow-y: auto; }

.sms-sidebar .nav-link {
    border-radius: var(--sms-radius-sm);
    margin: 2px 10px;
    color: var(--sms-sidebar-text) !important;
    transition: all .2s ease;
    position: relative;
}

.sms-sidebar .nav-link.active,
.sms-sidebar .nav-link:hover:not(.disabled) {
    background: rgba(67, 97, 238, 0.18) !important;
    color: #fff !important;
}

.sms-sidebar .nav-link.active { box-shadow: inset 3px 0 0 var(--sms-primary); }
.sms-sidebar .nav-link.disabled { opacity: .45; cursor: not-allowed; pointer-events: none; }

.sms-sidebar .nav-header {
    letter-spacing: .08em;
    font-size: .68rem;
    color: rgba(255, 255, 255, 0.4);
}

.sms-badge-soon {
    font-size: .6rem;
    background: rgba(255, 255, 255, 0.12);
    color: rgba(255, 255, 255, 0.7);
    font-weight: 600;
}

.sms-sidebar-footer {
    display: flex; align-items: center; gap: 10px;
    padding: 14px 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    color: #fff;
}
.sms-sidebar-footer-info { flex: 1; min-width: 0; color: rgba(255,255,255,.7); }
.sms-role-chip {
    display: inline-block;
    background: rgba(67, 97, 238, 0.22);
    color: #cdd6ff;
    border-radius: 20px;
    padding: 1px 8px;
    font-size: .62rem;
    text-transform: capitalize;
    margin-top: 2px;
}

/* ==========================================================================
   NAVBAR MODERN
   ========================================================================== */
.sms-navbar {
    background-color: var(--sms-surface) !important;
    border-bottom: 1px solid var(--sms-border);
    backdrop-filter: blur(6px);
}

.sms-icon-btn {
    width: 38px; height: 38px; border-radius: 10px;
    display: inline-flex; align-items: center; justify-content: center;
    color: var(--sms-text-muted) !important;
    transition: all .2s ease;
}
.sms-icon-btn:hover { background: color-mix(in srgb, var(--sms-primary) 12%, transparent); color: var(--sms-primary) !important; }

.sms-badge-dot {
    position: absolute; top: 8px; right: 8px;
    width: 8px; height: 8px; border-radius: 50%;
    background: #ef4444; border: 2px solid var(--sms-surface);
}

.sms-search-box {
    display: flex; align-items: center; gap: 8px;
    background: var(--sms-bg);
    border: 1px solid var(--sms-border);
    border-radius: 999px;
    padding: 6px 14px;
    min-width: 260px;
    color: var(--sms-text-muted);
}
.sms-search-box input { background: transparent; color: inherit; }
.sms-search-box input:focus { box-shadow: none; }

.sms-avatar {
    width: 34px; height: 34px; border-radius: 50%;
    background: linear-gradient(135deg, var(--sms-primary), var(--sms-primary-dark));
    color: #fff; display: flex; align-items: center; justify-content: center;
    font-size: .82rem; font-weight: 700;
}
.sms-avatar-sm { width: 32px; height: 32px; font-size: .75rem; flex-shrink: 0; }

.sms-user-toggle::after { display: none; }

.sms-dropdown-panel { border-radius: var(--sms-radius) !important; overflow: hidden; min-width: 260px; }

/* ==========================================================================
   BREADCRUMB
   ========================================================================== */
.sms-breadcrumb .breadcrumb { margin: 0; }
.sms-breadcrumb .breadcrumb-item, .sms-breadcrumb .breadcrumb-item a {
    font-size: .8rem; color: var(--sms-text-muted);
    text-decoration: none;
}
.sms-breadcrumb .breadcrumb-item.active { color: var(--sms-primary); font-weight: 600; }
.sms-breadcrumb .breadcrumb-item + .breadcrumb-item::before { color: var(--sms-border); }

/* ==========================================================================
   CARDS / STAT CARDS (Modern Cards)
   ========================================================================== */
.card {
    border-radius: var(--sms-radius) !important;
    border: 1px solid var(--sms-border);
    background-color: var(--sms-surface);
    box-shadow: var(--sms-shadow-sm);
    transition: box-shadow .2s ease, transform .2s ease;
}

.stat-card { position: relative; overflow: hidden; }
.stat-card::before {
    content: "";
    position: absolute; inset: 0 0 auto 0; height: 3px;
    background: linear-gradient(90deg, var(--sms-primary), var(--sms-primary-dark));
}
.stat-card:hover { transform: translateY(-3px); box-shadow: var(--sms-shadow-md); }

.stat-card .stat-icon {
    width: 52px; height: 52px; border-radius: 14px;
    display: flex; align-items: center; justify-content: center; font-size: 1.25rem;
    flex-shrink: 0;
}

.stat-trend { font-size: .72rem; font-weight: 700; display: inline-flex; align-items: center; gap: 4px; }
.stat-trend.up { color: #16a34a; }
.stat-trend.down { color: #e11d48; }

.form-control, .form-select, .input-group-text, .btn, .alert, .modal-content { border-radius: var(--sms-radius) !important; }
.form-control, .form-select { background-color: var(--sms-surface); border-color: var(--sms-border); color: inherit; }

.btn-primary { background-color: var(--sms-primary); border-color: var(--sms-primary); }
.btn-primary:hover, .btn-primary:focus { background-color: var(--sms-primary-dark); border-color: var(--sms-primary-dark); }
.btn-outline-primary { color: var(--sms-primary); border-color: var(--sms-primary); }
.btn-outline-primary:hover { background-color: var(--sms-primary); border-color: var(--sms-primary); }

a { color: var(--sms-primary); }

/* ==========================================================================
   LOGIN / AUTH PAGES
   ========================================================================== */
.login-page-bg { background: radial-gradient(circle at top left, var(--sms-primary) 0%, #1a2138 65%); }
.login-card { width: 100%; max-width: 420px; border-radius: 20px; }

/* ==========================================================================
   SKELETON LOADING
   ========================================================================== */
.skeleton {
    background: linear-gradient(90deg, var(--sms-border) 25%, color-mix(in srgb, var(--sms-border) 60%, var(--sms-surface)) 37%, var(--sms-border) 63%);
    background-size: 400% 100%;
    animation: sms-skeleton 1.4s ease infinite;
    border-radius: 8px;
    color: transparent !important;
    pointer-events: none;
    user-select: none;
}
.skeleton-text { height: .9em; margin-bottom: .4em; }
.skeleton-circle { border-radius: 50%; }

@keyframes sms-skeleton {
    0% { background-position: 100% 50%; }
    100% { background-position: 0 50%; }
}

.sms-fade-in { animation: sms-fade-in .35s ease; }
@keyframes sms-fade-in { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: translateY(0); } }

/* ==========================================================================
   THEME SETTINGS PANEL
   ========================================================================== */
.sms-theme-panel { width: 320px; }
.sms-mode-options { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.sms-mode-btn {
    display: flex; flex-direction: column; align-items: center; gap: 6px;
    padding: 12px 6px; border-radius: var(--sms-radius-sm);
    border: 1px solid var(--sms-border); background: var(--sms-bg);
    color: var(--sms-text-muted); font-size: .72rem; font-weight: 600;
    transition: all .2s ease;
}
.sms-mode-btn i { font-size: 1.1rem; }
.sms-mode-btn.active, .sms-mode-btn:hover { border-color: var(--sms-primary); color: var(--sms-primary); background: color-mix(in srgb, var(--sms-primary) 8%, transparent); }

.sms-accent-options { display: flex; gap: 10px; flex-wrap: wrap; }
.sms-accent-swatch {
    width: 32px; height: 32px; border-radius: 50%;
    border: 2px solid transparent; cursor: pointer;
    transition: transform .15s ease;
}
.sms-accent-swatch:hover { transform: scale(1.1); }
.sms-accent-swatch.active { border-color: var(--sms-text-muted); box-shadow: 0 0 0 2px var(--sms-surface), 0 0 0 4px currentColor; }

/* ==========================================================================
   MISC / SCROLLBAR
   ========================================================================== */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: var(--sms-border); border-radius: 8px; }

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 991.98px) {
    .sms-search-box { display: none; }
}
@media (max-width: 575.98px) {
    .app-content-header h3 { font-size: 1.1rem; }
    .stat-card .stat-icon { width: 44px; height: 44px; font-size: 1.05rem; }
    .sms-theme-panel { width: 90vw; }
}