/* ==========================================================================
   iPlusFlow Unified Web Application - Authentic Extension & Codeforces System
   ========================================================================== */

:root {
    /* Brand & Codeforces Palette */
    --brand-blue: #003399;
    --brand-blue-light: #2563eb;
    --brand-accent: #D8232A;
    --cf-header-bg: #3b5998;
    --cf-header-dark: #253e71;
    --cf-link-blue: #1874cd;
    --cf-link-hover: #0b5195;
    --cf-border: #cbd5e1;       /* Reduced thickness feel / lighter border */
    --cf-border-light: #e2e8f0; /* Softer border light */
    --cf-bg-page: #f8fafc;      /* Lighter page background (#f8fafc instead of pure white/grey) */
    --cf-bg-card: #ffffff;
    --cf-gradient-start: #e8f0f8;
    --cf-gradient-end: #dce6f0;

    /* Subtle Accent Backgrounds (Notion / GitHub Docs Aesthetic) */
    --accent-green: #10b981;
    --accent-green-dark: #059669;
    --accent-green-bg: #F5FBF7;   /* Ultra-subtle green (#F5FBF7 instead of vibrant #ecfdf5) */
    --accent-green-border: #bbf2d0;
    --accent-orange: #f59e0b;
    --accent-orange-dark: #d97706;
    --accent-orange-bg: #FFFBF0;  /* Ultra-subtle warm (#FFFBF0 instead of vibrant #fffbeb) */
    --accent-orange-border: #fde68a;

    /* Codeforces Handle Rank Colors */
    --cf-lgm: #ff0000;
    --cf-master: #ff8c00;
    --cf-cm: #aa00aa;
    --cf-expert: #0000ff;
    --cf-specialist: #03a89e;
    --cf-pupil: #008000;
    --cf-newbie: #808080;

    /* Shadows & Radii (~15% softer blurs) */
    --shadow-soft: 0 3px 14px -2px rgba(0, 0, 0, 0.04), 0 1px 4px -1px rgba(0, 0, 0, 0.02);
    --shadow-hover: 0 8px 20px -3px rgba(0, 0, 0, 0.07), 0 3px 8px -3px rgba(0, 0, 0, 0.03);
    --radius-card: 12px;
    --radius-sm: 10px;

    /* Fonts */
    --font-display: 'Cuprum', sans-serif;
    --font-sans: 'Source Sans 3', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    --font-mono: 'Roboto Mono', Consolas, monospace;
}

html {
    scroll-behavior: smooth;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--cf-bg-page);
    color: #222222;
    line-height: 1.62; /* Slightly increased around 1.6 for easier reading */
    font-size: 14px;
}

a {
    color: var(--cf-link-blue);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
    color: var(--cf-link-hover);
}

/* ==========================================================================
   APP HEADER & TOP NAVIGATION
   ========================================================================== */
.app-header-wrapper {
    background: #ffffff;
    border-bottom: 1px solid var(--cf-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.app-top-bar {
    max-width: 1240px;
    margin: 0 auto;
    padding: 10px 18px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.app-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.app-brand-logo {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    object-fit: contain;
}

.app-brand-title {
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.3px;
    color: var(--brand-blue);
}

.app-brand-badge {
    background: #e0e7ff;
    color: var(--brand-blue);
    font-family: var(--font-sans);
    font-size: 11px;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 12px;
    border: 1px solid #c7d2fe;
}

.header-right-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-header {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    font-size: 13px;
    font-weight: 600;
    border-radius: 5px;
    border: 1px solid var(--cf-border);
    background: #ffffff;
    color: #333333;
    transition: all 0.15s ease;
    cursor: pointer;
}

.btn-header:hover {
    background: #f1f5f9;
    border-color: var(--brand-blue);
    color: var(--brand-blue);
    text-decoration: none;
}

/* View Mode Toggle Switcher in App Top Bar */
.view-mode-toggle {
    display: inline-flex;
    align-items: center;
    background: #f1f5f9;
    border: 1px solid var(--cf-border);
    border-radius: 20px;
    padding: 3px;
    gap: 2px;
}

.mode-toggle-btn {
    border: none;
    background: transparent;
    font-family: var(--font-sans);
    font-size: 12.5px;
    font-weight: 600;
    color: #475569;
    padding: 5px 14px;
    border-radius: 16px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 5px;
}

.mode-toggle-btn.active {
    background: var(--brand-blue);
    color: #ffffff;
    box-shadow: 0 1px 4px rgba(0, 51, 153, 0.25);
}

.mode-toggle-btn:hover:not(.active) {
    color: var(--brand-blue);
    background: #e2e8f0;
}

/* ==========================================================================
   VIEW MODE VISIBILITY RULES (PRODUCT OVERVIEW vs ARCHITECTURE MANUAL)
   ========================================================================== */
body.mode-product .app-nav-bar,
body.mode-product .app-sidebar,
body.mode-product .page-view {
    display: none !important;
}

body.mode-product .product-landing-view {
    display: block !important;
}

body.mode-product .app-main-layout {
    max-width: 1120px;
    margin: 32px auto 48px auto;
}

body.mode-arch .product-landing-view {
    display: none !important;
}

body.mode-arch .app-nav-bar {
    display: block !important;
}

body.mode-arch .app-sidebar {
    display: flex !important;
}

body.mode-arch .app-main-layout {
    max-width: 1240px;
}

/* Product Landing Hero & Cards Styling */
.landing-hero {
    background: linear-gradient(135deg, #ffffff 0%, #f1f5f9 100%);
    border: 1px solid var(--cf-border-light);
    border-radius: var(--radius-card);
    padding: 36px 28px;
    margin-bottom: 28px;
    box-shadow: var(--shadow-soft);
}

.landing-title-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.landing-h1 {
    font-family: var(--font-display);
    font-size: 38px;
    font-weight: 700;
    color: var(--brand-blue);
    line-height: 1.1;
}

.landing-tagline {
    font-size: 17px;
    font-weight: 600;
    color: #334155;
    margin-bottom: 12px;
}

.landing-desc {
    font-size: 14.5px;
    color: #475569;
    max-width: 820px;
    line-height: 1.6;
    margin-bottom: 20px;
}

.landing-trust-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin-bottom: 24px;
}

.trust-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: #ffffff;
    border: 1px solid var(--cf-border);
    border-radius: 20px;
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 600;
    color: #1e293b;
    box-shadow: 0 1px 3px rgba(0,0,0,0.03);
}

.landing-cta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
}

.btn-cta-primary {
    background: var(--brand-blue);
    color: #ffffff !important;
    font-weight: 700;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: background 0.15s ease, transform 0.1s ease;
    border: none;
    cursor: pointer;
}

.btn-cta-primary:hover {
    background: #002266;
    text-decoration: none;
}

.btn-cta-secondary {
    background: #ffffff;
    color: #334155 !important;
    font-weight: 600;
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 14px;
    border: 1px solid var(--cf-border);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.15s ease;
    cursor: pointer;
}

.btn-cta-secondary:hover {
    background: #f8fafc;
    border-color: var(--brand-blue);
    color: var(--brand-blue) !important;
    text-decoration: none;
}

/* Feature Showcase Cards */
.feature-showcase-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 18px;
    margin: 24px 0;
}

.feature-showcase-card {
    background: #ffffff;
    border: 1px solid var(--cf-border-light);
    border-radius: var(--radius-sm);
    padding: 20px;
    box-shadow: var(--shadow-soft);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature-showcase-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    border-color: var(--brand-blue-light);
}

.feature-card-icon {
    font-size: 26px;
    margin-bottom: 8px;
}

.feature-card-title {
    font-weight: 700;
    font-size: 16px;
    color: #0f172a;
    margin-bottom: 6px;
}

.feature-card-desc {
    font-size: 13px;
    color: #475569;
    line-height: 1.55;
}

.placeholder-note {
    background: #fffbeb;
    border: 1px dashed #f59e0b;
    color: #b45309;
    font-size: 11.5px;
    padding: 6px 10px;
    border-radius: 6px;
    margin-top: 8px;
    font-family: var(--font-mono);
}

.btn-header-primary {
    background: var(--cf-header-bg);
    color: #ffffff;
    border-color: var(--cf-header-dark);
}

.btn-header-primary:hover {
    background: var(--cf-header-dark);
    color: #ffffff;
}

/* Secondary Codeforces Subnav Bar */
.app-nav-bar {
    background-color: var(--cf-header-bg);
    border-top: 1px solid var(--cf-header-dark);
}

.app-nav-container {
    max-width: 1240px;
    margin: 0 auto;
    display: flex;
    list-style: none;
    overflow-x: auto;
}

.app-nav-item a {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 16px;
    color: #ffffff;
    font-size: 13.5px;
    font-weight: 600;
    white-space: nowrap;
    transition: background-color 0.15s ease;
    cursor: pointer;
}

.app-nav-item a:hover,
.app-nav-item.active a {
    background-color: var(--cf-header-dark);
    text-decoration: none;
}

/* ==========================================================================
   APP MAIN LAYOUT (SIDEBAR INDEX + CONTENT AREA)
   ========================================================================== */
.app-main-layout {
    max-width: 1240px;
    margin: 28px auto 48px auto;
    padding: 0 18px;
    display: flex;
    gap: 28px;
    align-items: flex-start;
}

.app-sidebar {
    width: 220px;
    flex-shrink: 0;
    position: sticky;
    top: 74px;
    max-height: calc(100vh - 90px);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* Sidebar Navigation Links & Active State */
.app-sidebar .nav-link {
    display: flex;
    align-items: center;
    padding: 6px 10px;
    border-radius: 6px;
    color: #475569;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.15s ease;
    border-left: 3px solid transparent;
    text-decoration: none !important;
}

.app-sidebar .nav-link:hover {
    background: #f1f5f9;
    color: #1e293b;
}

.app-sidebar .nav-link.active {
    background: #eff6ff;
    color: var(--brand-blue);
    font-weight: 700;
    border-left: 3px solid var(--brand-blue);
    padding-left: 10px;
}

.app-sidebar .nav-link.active::before {
    content: '▶ ';
    font-size: 10px;
    margin-right: 6px;
    color: var(--brand-blue);
}

.app-content {
    flex: 1;
    min-width: 0;
}

/* ==========================================================================
   CODEFORCES ROUNDBOX & CAPTION STYLING
   ========================================================================== */
.roundbox {
    background: var(--cf-bg-card);
    border: 1px solid var(--cf-border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-soft);
    margin-bottom: 36px; /* Increased whitespace between sections so page breathes */
    overflow: hidden;
}

/* Shorter card headers (~48px height) */
.roundbox .caption {
    background: linear-gradient(to bottom, var(--cf-gradient-start) 0%, var(--cf-gradient-end) 100%);
    border-bottom: 1px solid var(--cf-border);
    color: var(--cf-header-bg);
    font-weight: bold;
    font-size: 13.5px;
    height: 48px; /* Standardized to 48px */
    padding: 0 14px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.roundbox .caption.titled {
    font-family: var(--font-display);
    font-size: 15.5px;
    letter-spacing: 0.1px;
}

.roundbox-body {
    padding: 18px 20px;
    line-height: 1.62;
}

/* Page Hero */
.page-hero {
    background: #ffffff;
    border: 1px solid var(--cf-border);
    border-radius: var(--radius-card);
    padding: 20px 24px;
    margin-bottom: 36px;
    border-left: 5px solid var(--brand-blue); /* Version 3 ideal: 5px colored left border */
    box-shadow: var(--shadow-soft);
}

.page-hero h1 {
    font-family: var(--font-display);
    font-size: 26px;
    color: var(--brand-blue);
    margin-bottom: 6px;
}

.page-hero p {
    color: #555555;
    font-size: 14px;
    line-height: 1.62;
}

/* Multi-Page Views */
.page-view {
    display: none;
}

.page-view.active {
    display: block;
    animation: fadeIn 0.2s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   EXACT 1:1 REAL EXTENSION DEFAULT POPUP FRAME (#popupRoot & MainUI)
   ========================================================================== */
.iplus-extension-popup-frame {
    background: #ffffff;
    border: 1px solid #ccc;
    border-radius: 0;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.14);
    width: 100%;
    max-width: 450px;
    margin: 10px auto;
    padding: 10px 12px;
    font-family: Verdana, sans-serif !important;
    font-size: 11px;
    color: #333333;
}

#popupHeader {
    display: flex;
    align-items: center;
    padding-bottom: 6px;
    border-bottom: 1px solid #ddd;
    margin-bottom: 6px;
    gap: 6px;
}

#popupLogo {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
}

#popupTitle {
    margin: 0;
    font-size: 15px !important;
    font-family: Verdana, sans-serif !important;
    font-weight: bold !important;
    color: #333333;
}

.iplus-streak-badge {
    background: #fff8e6;
    border: 1px solid #f59e0b;
    color: #d97706;
    padding: 2px 6px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: bold;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-left: 4px;
}

#resetHandle {
    margin-left: auto;
    background: transparent;
    border: none;
    font-size: 16px;
    cursor: pointer;
}

#resetHandle:hover {
    color: var(--brand-blue-light);
}

#controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
    margin-bottom: 4px;
}

#filter, #tagFilter {
    padding: 4px 6px;
    font-size: 11px !important;
    font-family: Verdana, sans-serif !important;
    border-radius: 3px;
    border: 1px solid #ccc;
    color: #333333;
    background-color: #ffffff;
}

#filter {
    min-width: 75px;
}

#tagFilter {
    flex: 1;
    min-width: 110px;
}

#sync {
    padding: 4px 10px;
    font-size: 11px !important;
    font-family: Verdana, sans-serif !important;
    border-radius: 3px;
    cursor: pointer;
    background: #e1ecf4 !important;
    border: 1px solid #a5c4dc !important;
    color: #333333;
    font-weight: 500;
}

#sync:hover {
    background: #d4e3f0 !important;
}

#lastSync {
    font-size: 10.5px !important;
    font-family: Verdana, sans-serif !important;
    margin: 2px 0 6px 0;
    color: gray;
}

/* Problem Table inside Popup */
table#table {
    width: 100%;
    table-layout: fixed;
    border-collapse: collapse;
    margin-top: 6px;
    background-color: #ffffff;
    font-family: Verdana, sans-serif !important;
}

table#table thead {
    background-color: #e9f1ff !important;
}

table#table th, table#table td {
    padding: 4px 5px;
    text-align: left;
    border: 1px solid #ccc;
    font-size: 11px !important;
    font-family: Verdana, sans-serif !important;
}

table#table tr.solved-row td {
    background-color: #d5f7d5 !important;
}

.edit-notes {
    padding: 2px 6px;
    font-size: 11px !important;
    font-family: Verdana, sans-serif !important;
    cursor: pointer;
    border: 1px solid #cccccc !important;
    background-color: #ffffff !important;
    color: #333333;
    border-radius: 3px;
}

.edit-notes:hover {
    background-color: #f0f0f0 !important;
    border-color: #999999 !important;
}

/* REAL EXTENSION NOTES MODAL (.iplus_modal) */
.iplus_modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 999999;
}

.iplus_modal.active {
    display: flex;
}

.iplus_modal-content {
    background: #ffffff;
    padding: 20px;
    border-radius: 10px;
    width: 92%;
    max-width: 520px;
    position: relative;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
    font-family: Verdana, sans-serif;
}

.iplus_close-button {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 24px;
    cursor: pointer;
    color: #888;
}

.iplus_close-button:hover {
    color: #000;
}

.iplus_modal h3 {
    margin-bottom: 12px;
    font-size: 16px;
    color: #333;
}

.iplus_modal textarea {
    width: 100%;
    border: 1px solid #ccc;
    border-radius: 6px;
    padding: 10px;
    font-family: Verdana, sans-serif;
    font-size: 13px;
    resize: vertical;
    outline: none;
}

.iplus_modal-footer {
    margin-top: 14px;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

.iplus_modal-footer button {
    padding: 6px 14px;
    font-size: 13px;
    border-radius: 4px;
    border: 1px solid #ccc;
    cursor: pointer;
}

#saveNoteBtn {
    background: var(--cf-header-bg);
    color: #fff;
    border-color: var(--cf-header-dark);
}

#cancelNoteBtn {
    background: #e2e8f0;
    color: #333;
}

/* Button & Card Utilities */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 600;
    border-radius: 5px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-primary {
    background: var(--cf-header-bg);
    color: #ffffff;
    border-color: var(--cf-header-dark);
}

.btn-primary:hover {
    background: var(--cf-header-dark);
}

.btn-secondary {
    background: #e2e8f0;
    color: #334155;
    border-color: #cbd5e1;
}

.btn-secondary:hover {
    background: #cbd5e1;
}

.btn-danger {
    background: #ef4444;
    color: #ffffff;
    border-color: #dc2626;
}

/* ==========================================================================
   AUTHENTIC SIMULATED CODEFORCES VIEWPORT
   ========================================================================== */
.sim-viewport-cf {
    background: #ffffff;
    border: 1px solid var(--cf-border); /* Reduced thickness by 50% */
    border-radius: var(--radius-card); /* 12px */
    box-shadow: var(--shadow-soft);
    overflow: hidden;
    margin-top: 14px;
    font-family: Arial, sans-serif;
    color: #222;
}

.sim-topbar-cf {
    background: var(--cf-gradient-start);
    border-bottom: 1px solid var(--cf-border);
    padding: 6px 12px; /* Shorter topbar padding */
    font-size: 12px;
    color: #3b5998;
    display: flex;
    justify-content: space-between;
    font-weight: 600;
}

.sim-body-cf {
    padding: 18px;
    background: #ffffff;
}

.cf-header-nav-sim {
    border-bottom: 1px solid #b9b9b9;
    padding-bottom: 10px;
    margin-bottom: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.cf-logo-text-sim {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 700;
}
.cf-logo-text-sim .c-blue { color: #003399; }
.cf-logo-text-sim .c-red { color: #D8232A; }

.cf-menu-links-sim {
    list-style: none;
    display: flex;
    gap: 14px;
    font-size: 13px;
    font-weight: bold;
    color: #3b5998;
}

.problem-statement-sim {
    background: #ffffff;
    padding: 4px;
}

.problem-statement-sim .title {
    font-size: 20px;
    font-weight: bold;
    color: #003399;
    border-bottom: 1px solid #e1e1e1;
    padding-bottom: 6px;
    margin-bottom: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sample-test-sim {
    background: #f8f8f8;
    border: 1px solid #e1e1e1;
    border-radius: 4px;
    padding: 10px;
    margin: 12px 0;
    font-family: var(--font-mono);
    font-size: 13px;
}

/* Real Extension Floating Orb */
.iplus-btn-real {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.12);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: grab;
    user-select: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.iplus-btn-real:hover {
    transform: scale(1.08);
    box-shadow: 0 6px 18px rgba(0,0,0,0.2);
}

.iplus-btn-real img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    pointer-events: none;
}

/* Floating Extension Drawer Panel */
.iplus-workspace-panel-sim {
    width: 340px;
    background: #ffffff;
    border: 1px solid var(--cf-border);
    border-radius: 12px;
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.15);
    overflow: hidden;
}

.iplus-panel-header {
    background: linear-gradient(to bottom, #e8f0f8 0%, #dce6f0 100%);
    border-bottom: 1px solid var(--cf-border);
    padding: 6px 12px; /* Shorter card header with less padding */
    font-weight: bold;
    font-size: 13.2px;
    color: #3b5998;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.iplus-panel-body {
    padding: 14px;
    font-size: 13px;
    line-height: 1.62;
}

/* Daily Streak Cells */
.streak-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 8px;
    margin: 12px 0;
}

.streak-day-cell {
    background: #ffffff;
    border: 1px solid var(--cf-border);
    border-radius: 6px;
    padding: 10px;
    text-align: center;
    cursor: pointer;
    transition: all 0.15s ease;
}

.streak-day-cell:hover {
    border-color: #f59e0b;
    background: #fffdf5;
}

.streak-day-cell.active {
    background: #fff8e6;
    border-color: #f59e0b;
    color: #d97706;
    font-weight: bold;
}

/* Codeforces Data Table & Rank Badges */
table.datatable {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    margin: 12px 0;
}

table.datatable th {
    background-color: #e1e9f0;
    color: #333;
    font-weight: bold;
    text-align: left;
    padding: 8px 10px;
    border: 1px solid var(--cf-border-light);
}

table.datatable td {
    padding: 8px 10px;
    border: 1px solid var(--cf-border-light);
    background-color: #fff;
}

table.datatable tr:nth-child(even) td {
    background-color: #f8f9fa;
}

code.inline-code {
    background: #f6f8fa;
    color: #8250df; /* GitHub Docs subtle purple/pink */
    padding: 2.5px 6px;
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 88%;
    border: 1px solid rgba(208, 215, 222, 0.6);
}

pre.code-block {
    background: #f8f8f8;
    color: #222222;
    padding: 14px;
    border-radius: 5px;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 12.5px;
    line-height: 1.5;
    margin: 10px 0;
    border: 1px solid var(--cf-border-light);
}

/* Rank Badges */
.rank-badge {
    font-weight: bold;
    padding: 1px 5px;
    border-radius: 3px;
    font-size: 12px;
}
.rank-lgm { color: var(--cf-lgm); font-weight: 800; }
.rank-master { color: var(--cf-master); font-weight: 700; }
.rank-cm { color: var(--cf-cm); font-weight: 700; }
.rank-expert { color: var(--cf-expert); font-weight: 700; }
.rank-specialist { color: var(--cf-specialist); font-weight: 700; }

/* Interactive SDE/SRE Cards Grid */
.note-card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
    margin: 32px 0;
}

.note-card {
    background: #ffffff;
    border: 1px solid var(--cf-border-light);
    border-left: 5px solid var(--cf-link-blue);
    border-radius: var(--radius-sm);
    padding: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: var(--shadow-soft);
}

.note-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

/* Match card left border color to tag/heading badge color */
.note-card:has(.tag-lgm) { border-left-color: var(--cf-lgm); }
.note-card:has(.tag-master) { border-left-color: var(--cf-master); }
.note-card:has(.tag-cm) { border-left-color: var(--cf-cm); }
.note-card:has(.tag-expert) { border-left-color: var(--cf-expert); }
.note-card:has(.tag-specialist) { border-left-color: var(--cf-specialist); }
.note-card:has(.tag-pupil) { border-left-color: var(--cf-pupil); }
.note-card:has(.tag-newbie) { border-left-color: var(--cf-newbie); }

.note-card:hover:has(.tag-lgm) { border-color: var(--cf-lgm); }
.note-card:hover:has(.tag-master) { border-color: var(--cf-master); }
.note-card:hover:has(.tag-cm) { border-color: var(--cf-cm); }
.note-card:hover:has(.tag-expert) { border-color: var(--cf-expert); }
.note-card:hover:has(.tag-specialist) { border-color: var(--cf-specialist); }

.note-card-tag {
    display: inline-block;
    padding: 2px 8px;
    font-size: 11px;
    font-weight: 700;
    border-radius: 4px;
    color: #fff;
    text-transform: uppercase;
    margin-bottom: 4px;
}

.tag-lgm { background-color: var(--cf-lgm); }
.tag-master { background-color: var(--cf-master); }
.tag-cm { background-color: var(--cf-cm); }
.tag-expert { background-color: var(--cf-expert); }
.tag-specialist { background-color: var(--cf-specialist); }

/* Shorter note card headers with less spacing */
.note-card-title {
    font-size: 14px;
    font-weight: 700;
    color: #111;
    margin-bottom: 2px; /* Reduced padding/margin */
}

.note-card-desc {
    font-size: 12px;
    color: #555;
    line-height: 1.62; /* Increased line-height around 1.6 */
}

.note-card-action {
    margin-top: 8px;
    font-size: 12px;
    font-weight: 600;
    color: var(--cf-link-blue);
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Callout Box & Accent Architecture (Consistent Layout: Blue / Green / Yellow) */
.cf-notice-box {
    background: #ffffff; /* Body stays white */
    border: 1px solid var(--cf-border);
    border-radius: var(--radius-card);
    margin: 32px 0;
    box-shadow: var(--shadow-soft);
    overflow: hidden;
}

/* Consistent Header Layout across all variants */
.cf-notice-header {
    background: linear-gradient(to bottom, #e8f0f8 0%, #dce6f0 100%); /* Very light blue */
    border-bottom: 1px solid var(--cf-border);
    color: var(--cf-header-bg); /* Blue text */
    font-weight: 700;
    font-size: 14px;
    padding: 10px 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Body layout: stays pure white */
.cf-notice-body {
    background: #ffffff;
    padding: 16px 20px;
    font-size: 13.5px;
    line-height: 1.62;
    color: #222;
}

/* Metric & Benchmark Cards with Collapsible Evidence */
.metric-card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
    gap: 16px;
    margin-top: 14px;
}

.metric-card {
    background: #ffffff;
    border: 1px solid var(--cf-border-light);
    border-radius: var(--radius-sm);
    padding: 16px;
    box-shadow: var(--shadow-soft);
    transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.metric-card:hover {
    box-shadow: var(--shadow-hover);
    border-color: var(--brand-blue-light);
}

.metric-card-title {
    font-weight: 700;
    font-size: 14.5px;
    color: #0f172a;
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
}

.metric-card-subtitle {
    font-size: 12.5px;
    color: #475569;
    line-height: 1.5;
    margin-bottom: 12px;
}

.cf-disclosure {
    border-top: 1px dashed var(--cf-border-light);
    padding-top: 8px;
    font-size: 12px;
}

.cf-disclosure summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--brand-blue-light);
    user-select: none;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 6px;
}

.cf-disclosure summary::-webkit-details-marker {
    display: none;
}

.cf-disclosure summary:hover {
    color: var(--brand-blue);
}

.cf-disclosure-body {
    margin-top: 10px;
    padding: 12px;
    background: #f8fafc;
    border: 1px solid var(--cf-border-light);
    border-radius: 6px;
    font-size: 12px;
    line-height: 1.6;
    color: #334155;
    display: grid;
    gap: 6px;
}

/* Green Variant (Optimization / Refactoring) */
.cf-notice-box.accent-green .cf-notice-header {
    background: #edf8f0; /* Very light mint */
    color: #059669; /* Green text */
}

/* Yellow/Orange Variant (Notice / Trade-off) */
.cf-notice-box.accent-orange .cf-notice-header {
    background: #fff9eb; /* Very light yellow (#fff9eb) */
    color: #d97706; /* Orange text */
}

/* Semantic Category Badges for Notice Boxes */
.notice-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2.5px 8px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    margin-right: 8px;
}

.notice-badge-green {
    background: #ecfdf5;
    color: #059669;
    border: 1px solid #a7f3d0;
}

.notice-badge-orange {
    background: #fffbeb;
    color: #d97706;
    border: 1px solid #fde68a;
}

/* Modal Overlay */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.65);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 99999;
    backdrop-filter: blur(2px);
    opacity: 0;
    transition: opacity 0.2s ease-in-out;
}

.modal-overlay.active {
    display: flex;
    opacity: 1;
}

.modal-window {
    background: #ffffff;
    width: 90%;
    max-width: 820px;
    max-height: 88vh;
    border: 1px solid var(--cf-header-bg); /* Reduced thickness by 50% from 2px */
    border-radius: var(--radius-card); /* 12px */
    box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.18);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: modalPop 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes modalPop {
    from { transform: scale(0.92); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

/* Shorter modal headers (~48px height) */
.modal-header {
    background: linear-gradient(to bottom, var(--cf-gradient-start) 0%, var(--cf-gradient-end) 100%);
    border-bottom: 1px solid var(--cf-border);
    height: 48px; /* Standardized to 48px */
    padding: 0 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title-text {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 700;
    color: var(--cf-header-bg);
    display: flex;
    align-items: center;
    gap: 8px;
}

.modal-close-btn {
    background: #d9534f;
    color: white;
    border: none;
    width: 26px;
    height: 26px;
    border-radius: 4px;
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close-btn:hover {
    background: #c9302c;
}

.modal-body-content {
    padding: 18px 20px;
    overflow-y: auto;
    font-size: 14px;
    line-height: 1.62;
    color: #222;
}

.modal-footer {
    background: #f1f3f5;
    border-top: 1px solid var(--cf-border-light);
    padding: 10px 16px;
    text-align: right;
}

.qa-card {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-left: 5px solid #3182ce; /* Version 3 ideal: 5px colored left border */
    padding: 14px;
    border-radius: var(--radius-sm);
    margin-bottom: 14px;
    box-shadow: var(--shadow-soft);
}

.qa-card .question {
    font-weight: 700;
    color: #2b6cb0;
    font-size: 14.5px;
    margin-bottom: 3px;
}

.qa-card .answer {
    color: #2d3748;
    font-size: 13.5px;
    line-height: 1.62;
}

/* Tech Badges for Hero Section */
.tech-badge {
    background: #f1f5f9;
    border: 1px solid #cbd5e1;
    color: #334155;
    font-size: 12px;
    font-weight: 600;
    padding: 3.5px 10px;
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
}

/* Footer with 24px padding */
footer.app-footer {
    max-width: 1240px;
    margin: 40px auto;
    padding: 24px 18px; /* Increased from ~18px to 24px */
    border-top: 1px solid var(--cf-border);
    text-align: center;
    color: #666666;
    font-size: 13.5px;
}

@media (max-width: 880px) {
    .app-main-layout {
        flex-direction: column;
    }
    .app-sidebar {
        width: 100%;
    }
}