/* ==========================================================================
   NextEdu OTP Gateway - Guruji Design System
   Dual Theme Architecture:
   - Light: White / Purple (#fbfaff / #ffffff / #7047ea)
   - Dark: Chocolaty / Neon Green (#17100c / #241811 / #5bff8f)
   Typography: Poppins (Clean, lightweight, elegant)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root,
[data-theme="dark"],
html[data-theme="dark"] {
    color-scheme: dark;
    --bg-base: #17100c;
    --bg-gradient: linear-gradient(180deg, #211713 0%, #17100c 52%, #100b08 100%);
    --surface-card: #241811;
    --surface-hover: #302018;
    --surface-solid: #21160f;
    --surface-glass: rgba(36, 24, 17, 0.85);
    
    --border-color: rgba(255, 238, 218, 0.11);
    --border-hover: rgba(91, 255, 143, 0.38);
    --border-focus: rgba(91, 255, 143, 0.55);
    
    --text-main: #fff6ec;
    --text-muted: #d4c0ae;
    --text-dim: #9b8373;
    
    --primary: #5bff8f;
    --primary-hover: #4be981;
    --primary-glow: rgba(91, 255, 143, 0.28);
    --primary-text: #0f1c12;
    
    --secondary-bg: rgba(255, 238, 218, 0.06);
    --secondary-hover: rgba(255, 238, 218, 0.12);
    --secondary-text: #fff6ec;
    
    --accent: #5bff8f;
    --accent-purple: #9b7cff;
    --success: #5bff8f;
    --warning: #ffc86b;
    --danger: #ff6b81;
    --info: #64b5f6;
    
    --card-shadow: 0 16px 44px rgba(0, 0, 0, 0.42);
    --soft-shadow: 0 8px 24px rgba(0, 0, 0, 0.26);
    
    --header-bg: rgba(23, 16, 12, 0.88);
    --sidebar-bg: #1c130e;
    --code-bg: #120b08;
}

[data-theme="light"],
html[data-theme="light"] {
    color-scheme: light;
    --bg-base: #fbfaff;
    --bg-gradient: linear-gradient(180deg, #ffffff 0%, #fbfaff 52%, #f4efff 100%);
    --surface-card: #ffffff;
    --surface-hover: #f7f2ff;
    --surface-solid: #ffffff;
    --surface-glass: rgba(255, 255, 255, 0.92);
    
    --border-color: rgba(112, 71, 234, 0.12);
    --border-hover: rgba(112, 71, 234, 0.38);
    --border-focus: rgba(112, 71, 234, 0.55);
    
    --text-main: #151334;
    --text-muted: #68627e;
    --text-dim: #9a93ad;
    
    --primary: #7047ea;
    --primary-hover: #5b32d6;
    --primary-glow: rgba(112, 71, 234, 0.25);
    --primary-text: #ffffff;
    
    --secondary-bg: rgba(112, 71, 234, 0.06);
    --secondary-hover: rgba(112, 71, 234, 0.12);
    --secondary-text: #7047ea;
    
    --accent: #7047ea;
    --accent-purple: #7c3aed;
    --success: #059669;
    --warning: #d97706;
    --danger: #e11d48;
    --info: #0284c7;
    
    --card-shadow: 0 16px 38px rgba(112, 71, 234, 0.08);
    --soft-shadow: 0 8px 20px rgba(112, 71, 234, 0.05);
    
    --header-bg: rgba(255, 255, 255, 0.9);
    --sidebar-bg: #ffffff;
    --code-bg: #f5f2fa;
}

/* Base Styles & Ultra-Smooth Performance Optimization */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    font-size: 14.5px;
    font-weight: 400;
    line-height: 1.6;
    color: var(--text-main);
    background: var(--bg-gradient);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* Silky Smooth Theme Switch Transition (Activated exclusively during active toggle) */
.theme-switching,
.theme-switching *,
.theme-switching *::before,
.theme-switching *::after {
    transition: background-color 0.25s ease, border-color 0.25s ease, color 0.2s ease, box-shadow 0.25s ease !important;
}

/* Ultra-Clean Modern Scrollbars */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.16);
    border-radius: 9999px;
    transition: background 0.2s ease;
}
[data-theme="light"] ::-webkit-scrollbar-thumb {
    background: rgba(112, 71, 234, 0.2);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}
* {
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.16) transparent;
}
[data-theme="light"] * {
    scrollbar-color: rgba(112, 71, 234, 0.2) transparent;
}

/* Layout */
.app-wrapper {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 100;
    backdrop-filter: blur(16px);
}

.main-content {
    flex: 1;
    margin-left: 260px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.topbar {
    height: 70px;
    background: var(--header-bg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 32px;
    position: sticky;
    top: 0;
    z-index: 90;
    backdrop-filter: blur(16px);
}

.page-container {
    padding: 32px;
    max-width: 1240px;
    width: 100%;
    margin: 0 auto;
    flex: 1;
}

/* Brand / Logo */
.brand-box {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
    text-decoration: none;
}

.brand-icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: var(--primary);
    color: var(--primary-text);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 18px;
    box-shadow: 0 6px 16px var(--primary-glow);
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-title {
    font-size: 15.5px;
    font-weight: 600;
    color: var(--text-main);
    line-height: 1.2;
}

.brand-sub {
    font-size: 11px;
    color: var(--text-muted);
    font-weight: 400;
}

/* Navigation Links */
.nav-menu {
    list-style: none;
    padding: 18px 14px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
    overflow-y: auto;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 16px;
    border-radius: 12px;
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    font-size: 13.5px;
    transition: all 0.2s ease;
}

.nav-link:hover {
    color: var(--text-main);
    background: var(--secondary-bg);
}

.nav-link.active {
    color: var(--primary);
    background: var(--secondary-bg);
    border: 1px solid var(--border-hover);
    font-weight: 600;
}

.nav-link .nav-icon {
    font-size: 17px;
    width: 22px;
    display: flex;
    justify-content: center;
}

/* User / Sidebar Footer */
.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.user-mini {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 13px;
}

.user-meta {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-main);
    line-height: 1.2;
}

.user-role {
    font-size: 11px;
    color: var(--text-muted);
}

/* Theme Switcher Button */
.theme-toggle-btn {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 8px 14px;
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: inherit;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.theme-toggle-btn:hover {
    background: var(--secondary-hover);
    border-color: var(--border-hover);
    color: var(--primary);
}

/* Floating Theme Switcher (for Auth/Login/Register & Standalone pages) */
.theme-float {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
}

.theme-switcher-btn {
    background: var(--surface-glass);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 8px 14px;
    border-radius: 12px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: inherit;
    font-size: 13px;
    font-weight: 500;
    box-shadow: var(--soft-shadow);
    backdrop-filter: blur(12px);
    transition: all 0.2s ease;
}

.theme-switcher-btn:hover {
    background: var(--surface-hover);
    border-color: var(--border-hover);
    color: var(--primary);
    transform: translateY(-1px);
}

.theme-switcher-btn .theme-icon {
    font-size: 15px;
    line-height: 1;
}

.theme-switcher-btn .theme-text {
    font-size: 12.5px;
    font-weight: 600;
}

/* Mobile Hamburger Menu Button */
.mobile-menu-btn {
    display: none;
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    width: 38px;
    height: 38px;
    border-radius: 10px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    line-height: 1;
    transition: all 0.2s ease;
}

.mobile-menu-btn:hover {
    background: var(--secondary-hover);
    border-color: var(--border-hover);
    color: var(--primary);
}

/* Sidebar Backdrop Overlay */
.sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(4px);
    z-index: 95;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sidebar-backdrop.active {
    display: block;
    opacity: 1;
}

/* Cards & Surfaces */
.card {
    background: var(--surface-card);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    padding: 24px;
    box-shadow: var(--soft-shadow);
    position: relative;
    backdrop-filter: blur(12px);
    margin-bottom: 24px;
}

.card:hover {
    border-color: var(--border-hover);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 18px;
    flex-wrap: wrap;
    gap: 12px;
}

.card-title {
    font-size: 16.5px;
    font-weight: 600;
    color: var(--text-main);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-subtitle {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Metric / Stat Cards */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.metric-card {
    background: var(--surface-card);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    padding: 22px;
    box-shadow: var(--soft-shadow);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.metric-card:hover {
    transform: translateY(-2px);
    border-color: var(--border-hover);
}

.metric-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.metric-title {
    font-size: 12px;
    text-transform: uppercase;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

.metric-icon {
    font-size: 20px;
    opacity: 0.85;
}

.metric-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-main);
    font-family: 'JetBrains Mono', 'Poppins', monospace;
    line-height: 1.1;
    margin-bottom: 6px;
}

.metric-sub {
    font-size: 12.5px;
    color: var(--text-muted);
}

/* 3-Tier Plan Selector Cards */
.plans-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 28px;
}

@media (max-width: 900px) {
    .plans-grid {
        grid-template-columns: 1fr;
    }
}

.plan-card {
    background: var(--surface-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 28px 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    transition: all 0.25s ease;
}

.plan-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: var(--card-shadow);
}

.plan-card.featured {
    border-color: var(--primary);
    background: linear-gradient(180deg, var(--secondary-bg) 0%, var(--surface-card) 60%);
    box-shadow: 0 10px 30px var(--primary-glow);
}

.plan-badge {
    position: absolute;
    top: 14px;
    right: 18px;
    background: var(--primary);
    color: var(--primary-text);
    font-size: 10.5px;
    font-weight: 700;
    text-transform: uppercase;
    padding: 4px 12px;
    border-radius: 20px;
    box-shadow: 0 4px 14px var(--primary-glow);
    letter-spacing: 0.5px;
    z-index: 5;
    pointer-events: none;
}

.plan-name {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 6px;
}

.plan-desc {
    font-size: 12.5px;
    color: var(--text-muted);
    margin-bottom: 18px;
    min-height: 38px;
}

.plan-price-box {
    margin-bottom: 20px;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--border-color);
}

.plan-price-main {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
    font-family: 'JetBrains Mono', 'Poppins', monospace;
    line-height: 1;
}

.plan-price-rate {
    font-size: 13.5px;
    color: var(--text-muted);
    margin-top: 6px;
    font-weight: 500;
}

.plan-features {
    list-style: none;
    margin-bottom: 24px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    flex: 1;
}

.plan-features li {
    font-size: 13px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 8px;
}

.plan-features li .check-icon {
    color: var(--primary);
    font-weight: 700;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 12px;
    font-family: inherit;
    font-size: 13.5px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    border: 1px solid transparent;
    transition: transform 0.18s cubic-bezier(0.16, 1, 0.3, 1),
                box-shadow 0.18s cubic-bezier(0.16, 1, 0.3, 1),
                background-color 0.18s ease,
                border-color 0.18s ease,
                color 0.15s ease;
    line-height: 1.4;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.btn:hover {
    transform: translateY(-1.5px);
}

.btn:active {
    transform: translateY(0.5px) scale(0.985) !important;
}

.btn-primary {
    background: var(--primary);
    color: var(--primary-text);
    border-color: var(--primary);
    box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-primary:hover {
    background: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--secondary-bg);
    color: var(--secondary-text);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background: var(--secondary-hover);
    border-color: var(--border-hover);
}

.btn-danger {
    background: rgba(239, 68, 68, 0.15);
    color: var(--danger);
    border-color: rgba(239, 68, 68, 0.25);
}

.btn-danger:hover {
    background: var(--danger);
    color: #fff;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
    border-radius: 8px;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 15px;
    border-radius: 14px;
}

.btn-block {
    width: 100%;
}

/* Forms & Inputs */
.form-group {
    margin-bottom: 18px;
}

label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-main);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 11px 16px;
    border-radius: 12px;
    background: var(--surface-card);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    font-family: inherit;
    font-size: 14px;
    transition: all 0.2s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.form-control-mono {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 3px 10px;
    border-radius: 8px;
    font-size: 11.5px;
    font-weight: 600;
    line-height: 1.4;
}

.badge-success {
    background: rgba(91, 255, 143, 0.15);
    color: var(--success);
    border: 1px solid rgba(91, 255, 143, 0.3);
}

.badge-danger {
    background: rgba(255, 107, 129, 0.15);
    color: var(--danger);
    border: 1px solid rgba(255, 107, 129, 0.3);
}

.badge-warning {
    background: rgba(255, 200, 107, 0.15);
    color: var(--warning);
    border: 1px solid rgba(255, 200, 107, 0.3);
}

.badge-primary {
    background: var(--secondary-bg);
    color: var(--primary);
    border: 1px solid var(--border-hover);
}

/* Tables */
.table-responsive {
    overflow-x: auto;
    border-radius: 14px;
    border: 1px solid var(--border-color);
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13.5px;
    text-align: left;
}

.table th {
    background: var(--secondary-bg);
    padding: 13px 16px;
    font-size: 11.5px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-color);
}

.table td {
    padding: 13px 16px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
    vertical-align: middle;
    transition: background-color 0.15s ease;
}

.table tr:last-child td {
    border-bottom: none;
}

.table tr:hover td {
    background: var(--secondary-bg);
}

/* Alerts */
.alert {
    padding: 14px 18px;
    border-radius: 14px;
    font-size: 13.5px;
    margin-bottom: 22px;
    display: flex;
    align-items: center;
    gap: 12px;
    line-height: 1.4;
}

.alert-success {
    background: rgba(91, 255, 143, 0.12);
    border: 1px solid rgba(91, 255, 143, 0.3);
    color: var(--success);
}

.alert-error {
    background: rgba(255, 107, 129, 0.12);
    border: 1px solid rgba(255, 107, 129, 0.3);
    color: var(--danger);
}

.alert-info {
    background: var(--secondary-bg);
    border: 1px solid var(--border-hover);
    color: var(--primary);
}

/* Code Snippets & Box */
.code-box {
    background: var(--code-bg);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 16px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12.5px;
    overflow-x: auto;
    position: relative;
}

.copy-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    padding: 4px 10px;
    font-size: 11px;
}

/* Tabs */
.tabs-header {
    display: flex;
    gap: 8px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 18px;
}

.tab-btn {
    padding: 10px 18px;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-muted);
    font-family: inherit;
    font-size: 13.5px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.tab-btn:hover {
    color: var(--text-main);
}

.tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    font-weight: 600;
}

/* Responsive Grid Utilities */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

@media (max-width: 900px) {
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Comprehensive Mobile Responsiveness */
@media (max-width: 768px) {
    .mobile-menu-btn {
        display: inline-flex;
    }

    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        box-shadow: none;
        z-index: 100;
    }

    .sidebar.open {
        transform: translateX(0);
        box-shadow: 0 0 50px rgba(0, 0, 0, 0.7);
    }

    .main-content {
        margin-left: 0;
        width: 100%;
        min-width: 0;
    }

    .topbar {
        padding: 0 16px;
        height: 62px;
    }

    .topbar h1 {
        font-size: 15px !important;
    }

    .page-container {
        padding: 16px 12px;
        max-width: 100%;
    }

    .card {
        padding: 18px 14px;
        border-radius: 14px;
    }

    .card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .metrics-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .table-responsive {
        width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .table th,
    .table td {
        padding: 10px 12px;
        font-size: 12.5px;
        white-space: nowrap;
    }
}

@media (max-width: 480px) {
    .theme-float {
        top: 12px;
        right: 12px;
    }

    .theme-switcher-btn {
        padding: 6px 10px;
        font-size: 11.5px;
    }

    .topbar {
        padding: 0 10px;
        height: 58px;
    }

    .topbar h1 {
        font-size: 14px !important;
    }

    .btn {
        padding: 8px 14px;
        font-size: 12.5px;
    }

    .badge {
        font-size: 10.5px;
        padding: 3px 8px;
    }
}