/**
 * ============================================================================
 * NAVGYAN STUDENT DESIGN SYSTEM (GLOBAL CSS TOKENS & TYPOGRAPHY)
 * Standardized across All Student Pages:
 * - left_sidebar.blade.php
 * - my_test_papers/index.blade.php
 * - my_test_packages/index.blade.php
 * - my_test_results/index.blade.php
 * - student/dashboard/index.blade.php
 *
 * Adheres to Apple HIG, Material Design 3, and Modern EdTech Standards.
 * ============================================================================
 */

:root {
    /* 1. TYPOGRAPHY SCALE (Desktop & Laptop >= 992px) */
    --ds-font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    
    --ds-text-h1: 26px;       /* Main Page Title (H1) */
    --ds-text-h2: 20px;       /* Section / Subject / Package Title (H2) */
    --ds-text-h3: 17px;       /* Card Header / Chapter Title (H3) */
    --ds-text-nav: 15px;      /* Sidebar Navigation Links */
    --ds-text-body: 15px;     /* Paragraph / General Body Text */
    --ds-text-btn: 15px;      /* Button CTA Text */
    --ds-text-meta: 13px;     /* Subtitles / Board-Medium Info / Breadcrumbs */
    --ds-text-badge: 12px;    /* Status Badges / Count Pills */
    --ds-text-micro: 11px;    /* Fine Print */

    /* Font Weights */
    --ds-weight-bold: 800;
    --ds-weight-semibold: 650;
    --ds-weight-medium: 550;
    --ds-weight-regular: 400;

    /* Line Heights */
    --ds-leading-tight: 1.25;
    --ds-leading-snug: 1.35;
    --ds-leading-normal: 1.5;

    /* 2. CORPORATE COLOR PALETTE (Strict High Contrast) */
    --ds-color-text-primary: #0f172a;    /* Slate 900 - Deep crisp readable black */
    --ds-color-text-secondary: #334155;  /* Slate 700 - High-contrast readable secondary */
    --ds-color-text-muted: #64748b;      /* Slate 500 - Subtitles & metadata */
    --ds-color-text-white: #ffffff;

    --ds-color-canvas: #f8fafc;          /* Slate 50 - Universal neutral background */
    --ds-color-card-bg: #ffffff;         /* Pure White card */
    --ds-color-border: #e2e8f0;          /* Clean border */
    --ds-color-border-hover: #cbd5e1;

    /* Brand Primary Accent (Emerald Green) */
    --ds-color-primary: #10b981;
    --ds-color-primary-hover: #059669;
    --ds-color-primary-light: #ecfdf5;
    --ds-color-primary-border: #a7f3d0;
    --ds-color-primary-text: #059669;

    /* Status Accents */
    --ds-color-amber: #f59e0b;
    --ds-color-amber-hover: #d97706;
    --ds-color-amber-light: #fffbeb;
    --ds-color-amber-border: #fde68a;
    --ds-color-amber-text: #b45309;

    --ds-color-blue: #3b82f6;
    --ds-color-blue-light: #eff6ff;
    --ds-color-blue-border: #bfdbfe;
    --ds-color-blue-text: #1d4ed8;

    --ds-color-danger: #ef4444;
    --ds-color-danger-light: #fef2f2;
    --ds-color-danger-text: #dc2626;

    /* 3. BUTTONS & TOUCH TARGET SPECIFICATIONS */
    --ds-btn-height-lg: 46px;            /* Primary CTA Height on Desktop */
    --ds-btn-height-md: 42px;            /* Secondary Action Height */
    --ds-btn-height-sm: 36px;            /* Small / Utility Button */
    --ds-radius-card: 18px;              /* Standard Card Corner Radius */
    --ds-radius-btn: 10px;               /* Standard Button Corner Radius */
    --ds-radius-pill: 20px;              /* Pill Badge Radius */

    /* 4. ELEVATION / AMBIENT SHADOW */
    --ds-shadow-sm: 0 2px 6px rgba(15, 23, 42, 0.03);
    --ds-shadow-md: 0 4px 16px -2px rgba(15, 23, 42, 0.05);
    --ds-shadow-hover: 0 10px 25px -4px rgba(15, 23, 42, 0.08);
}

/* RESPONSIVE SCALING FOR MOBILE & SMALL TABLETS (< 768px) */
@media (max-width: 767.98px) {
    :root {
        --ds-text-h1: 20px;
        --ds-text-h2: 17px;
        --ds-text-h3: 15px;
        --ds-text-nav: 14px;
        --ds-text-body: 14px;
        --ds-text-btn: 14px;
        --ds-text-meta: 12px;
        --ds-text-badge: 11px;
        --ds-text-micro: 10px;

        --ds-btn-height-lg: 44px; /* Minimum ergonomic touch target */
        --ds-btn-height-md: 40px;
        --ds-btn-height-sm: 34px;
        --ds-radius-card: 14px;
        --ds-radius-btn: 8px;
    }
}

/* ============================================================================
   GLOBAL RESET FOR STUDENT PANEL PAGES
   ============================================================================ */
.my-course-content {
    background-color: var(--ds-color-canvas) !important;
    font-family: var(--ds-font-family);
    color: var(--ds-color-text-primary);
    padding: 24px 0 50px;
}

/* Kill legacy banner cut-offs completely */
.profile-banner-area {
    display: none !important;
}
.profile-banner-area-container {
    margin-top: 0 !important;
}

/* ============================================================================
   TYPOGRAPHY UTILITY CLASSES
   ============================================================================ */
.ds-h1 {
    font-size: var(--ds-text-h1) !important;
    font-weight: var(--ds-weight-bold) !important;
    color: var(--ds-color-text-primary) !important;
    line-height: var(--ds-leading-tight) !important;
    margin-bottom: 8px;
    letter-spacing: -0.3px;
}

.ds-h2 {
    font-size: var(--ds-text-h2) !important;
    font-weight: var(--ds-weight-bold) !important;
    color: var(--ds-color-text-primary) !important;
    line-height: var(--ds-leading-snug) !important;
    margin-bottom: 4px;
    letter-spacing: -0.2px;
}

.ds-h3 {
    font-size: var(--ds-text-h3) !important;
    font-weight: var(--ds-weight-bold) !important;
    color: var(--ds-color-text-primary) !important;
    line-height: var(--ds-leading-snug) !important;
    margin-bottom: 4px;
}

.ds-meta {
    font-size: var(--ds-text-meta) !important;
    font-weight: var(--ds-weight-semibold) !important;
    color: var(--ds-color-text-muted) !important;
    line-height: var(--ds-leading-normal) !important;
}

.ds-body {
    font-size: var(--ds-text-body) !important;
    font-weight: var(--ds-weight-medium) !important;
    color: var(--ds-color-text-secondary) !important;
    line-height: var(--ds-leading-normal) !important;
}

/* ============================================================================
   BUTTON SYSTEM (Fixed Heights, Colors & Radius)
   ============================================================================ */
.ds-btn {
    font-family: var(--ds-font-family);
    font-size: var(--ds-text-btn) !important;
    font-weight: var(--ds-weight-bold) !important;
    border-radius: var(--ds-radius-btn) !important;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-decoration: none !important;
    transition: all 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
    white-space: nowrap;
    border: none;
    cursor: pointer;
}

/* Primary Green CTA (Start Test, Buy Now) */
.ds-btn-primary {
    background: linear-gradient(135deg, var(--ds-color-primary) 0%, var(--ds-color-primary-hover) 100%) !important;
    color: var(--ds-color-text-white) !important;
    height: var(--ds-btn-height-lg);
    padding: 0 22px;
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
}
.ds-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(16, 185, 129, 0.4);
    color: var(--ds-color-text-white) !important;
}

/* Secondary White Action (Open Subject, View Papers) */
.ds-btn-secondary {
    background: #ffffff !important;
    color: var(--ds-color-text-primary) !important;
    border: 1.5px solid var(--ds-color-border-hover) !important;
    height: var(--ds-btn-height-md);
    padding: 0 20px;
    box-shadow: var(--ds-shadow-sm);
}
.ds-btn-secondary:hover {
    background: var(--ds-color-primary) !important;
    color: #ffffff !important;
    border-color: var(--ds-color-primary) !important;
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
}

/* Outline Utility Button (Back to Subjects, Retake) */
.ds-btn-outline {
    background: #ffffff !important;
    color: var(--ds-color-text-secondary) !important;
    border: 1.5px solid var(--ds-color-border) !important;
    height: var(--ds-btn-height-sm);
    padding: 0 16px;
    font-size: var(--ds-text-meta) !important;
}
.ds-btn-outline:hover {
    background: #f1f5f9 !important;
    color: var(--ds-color-text-primary) !important;
    border-color: var(--ds-color-border-hover) !important;
}

/* Warning / Paywall Button (Unlock) */
.ds-btn-warning {
    background: linear-gradient(135deg, var(--ds-color-amber) 0%, var(--ds-color-amber-hover) 100%) !important;
    color: #ffffff !important;
    height: var(--ds-btn-height-lg);
    padding: 0 22px;
    box-shadow: 0 4px 14px rgba(245, 158, 11, 0.3);
}
.ds-btn-warning:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(245, 158, 11, 0.4);
    color: #ffffff !important;
}

/* ============================================================================
   STANDARDIZED CARD SYSTEM
   ============================================================================ */
.ds-card {
    background: var(--ds-color-card-bg);
    border: 1.5px solid var(--ds-color-border);
    border-radius: var(--ds-radius-card);
    box-shadow: var(--ds-shadow-md);
    padding: 22px;
    transition: all 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.ds-card:hover {
    border-color: var(--ds-color-border-hover);
    box-shadow: var(--ds-shadow-hover);
}

/* ============================================================================
   STATUS BADGES & PILLS
   ============================================================================ */
.ds-badge {
    font-size: var(--ds-text-badge);
    font-weight: var(--ds-weight-bold);
    padding: 4px 10px;
    border-radius: var(--ds-radius-pill);
    display: inline-flex;
    align-items: center;
    gap: 5px;
    line-height: 1;
    border: 1px solid transparent;
}
.ds-badge-pending {
    background: var(--ds-color-amber-light);
    color: var(--ds-color-amber-text);
    border-color: var(--ds-color-amber-border);
}
.ds-badge-done {
    background: var(--ds-color-primary-light);
    color: var(--ds-color-primary-text);
    border-color: var(--ds-color-primary-border);
}
.ds-badge-neutral {
    background: #f1f5f9;
    color: #334155;
    border-color: #e2e8f0;
}

/* ============================================================================
   STANDARDIZED LEFT SIDEBAR SPECIFICATION
   ============================================================================ */
.ds-sidebar-card {
    background: var(--ds-color-card-bg);
    border-radius: 20px;
    border: 1.5px solid var(--ds-color-border);
    box-shadow: var(--ds-shadow-md);
    padding: 24px 16px;
    position: sticky;
    top: 90px;
}
.ds-sidebar-name {
    font-size: 1.25rem;
    font-weight: var(--ds-weight-bold);
    color: var(--ds-color-text-primary);
    margin: 0 0 6px;
}
.ds-sidebar-class-badge {
    background: var(--ds-color-primary-light);
    color: var(--ds-color-primary-text);
    font-size: var(--ds-text-meta);
    font-weight: var(--ds-weight-bold);
    padding: 4px 12px;
    border-radius: var(--ds-radius-pill);
    border: 1.5px solid var(--ds-color-primary-border);
    display: inline-flex;
    align-items: center;
    gap: 5px;
}
.ds-sidebar-nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 14px;
    border-radius: 12px;
    font-size: var(--ds-text-nav) !important;
    font-weight: var(--ds-weight-semibold) !important;
    color: var(--ds-color-text-primary) !important;
    text-decoration: none !important;
    transition: all 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
    position: relative;
}
.ds-sidebar-nav-link .nav-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 17px;
    background: #f1f5f9;
    color: var(--ds-color-text-secondary);
    flex-shrink: 0;
    transition: all 0.2s ease;
}
.ds-sidebar-nav-link:hover {
    background: #f1f5f9;
    color: var(--ds-color-text-primary) !important;
    transform: translateX(3px);
}
.ds-sidebar-nav-item.active .ds-sidebar-nav-link {
    background: var(--ds-color-primary-light);
    color: var(--ds-color-primary-text) !important;
    font-weight: var(--ds-weight-bold) !important;
}
.ds-sidebar-nav-item.active .ds-sidebar-nav-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 6px;
    bottom: 6px;
    width: 4px;
    border-radius: 0 4px 4px 0;
    background: var(--ds-color-primary);
}
.ds-sidebar-nav-item.active .ds-sidebar-nav-link .nav-icon {
    background: var(--ds-color-primary);
    color: #ffffff;
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.35);
}

/* ============================================================================
   MOBILE RESPONSIVENESS & BOTTOM APP BAR
   ============================================================================ */
@media (max-width: 767.98px) {
    /* Hide marketing corporate footer completely on student portal */
    body.is-student footer, 
    body.is-student .footer-area, 
    body.is-student .footer-bottom,
    body.is-student .copyright-area, 
    body.is-student section.footer,
    body:has(.my-course-content) footer,
    body:has(.my-course-content) .footer-area,
    body:has(.my-course-content) .footer-bottom {
        display: none !important;
    }
    body.is-student,
    body:has(.my-course-content) {
        padding-bottom: 85px !important;
    }
    .my-course-content {
        padding: 16px 0 40px !important;
    }
}

.mobile-app-bottom-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: #ffffff;
    border-top: 1px solid var(--ds-color-border);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.08);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: space-around;
    padding: 6px 4px 8px;
}
.app-bottom-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    color: var(--ds-color-text-muted);
    text-decoration: none !important;
    font-size: var(--ds-text-micro);
    font-weight: var(--ds-weight-semibold);
    gap: 3px;
    transition: all 0.2s ease;
    position: relative;
}
.app-bottom-item i {
    font-size: 20px;
}
.app-bottom-item.active {
    color: var(--ds-color-primary);
    font-weight: var(--ds-weight-bold);
}
.app-bottom-item.active::after {
    content: '';
    position: absolute;
    top: -6px;
    width: 24px;
    height: 3px;
    background: var(--ds-color-primary);
    border-radius: 0 0 4px 4px;
}
.crown-leaderboard-icon {
    width: 22px;
    height: 22px;
    object-fit: contain;
}