/* ============================================================
   EDUTECH ACADEMIA - Theme Stylesheet
   ============================================================
   Brand Colors extracted from the Edutech Academia logo:
   - Primary Royal Blue:    #1565C0 (top-left quadrant, text)
   - Teal/Cyan:             #00ACC1 (top-right quadrant)
   - Fresh Green:           #4CAF50 (bottom-left quadrant)
   - Vibrant Orange:        #FF7043 (bottom-right quadrant)
   - Crown Gold:            #FFB300 (crown accent)
   - Deep Navy:             #0D47A1 (dark variant)
   - Light Blue:            #E3F2FD (light background tint)
   ============================================================
   This file EXTENDS the existing style.css without overriding it.
   It adds Edutech-specific variables, components, and utilities.
   ============================================================ */

/* ===== EDUTECH CSS VARIABLES ===== */
:root {
    /* Brand Colors */
    --edu-primary: #1565C0;
    --edu-primary-dark: #0D47A1;
    --edu-primary-light: #42A5F5;
    --edu-primary-lighter: #E3F2FD;
    --edu-teal: #00ACC1;
    --edu-teal-dark: #00838F;
    --edu-teal-light: #B2EBF2;
    --edu-green: #4CAF50;
    --edu-green-dark: #388E3C;
    --edu-green-light: #C8E6C9;
    --edu-orange: #FF7043;
    --edu-orange-dark: #E64A19;
    --edu-orange-light: #FFCCBC;
    --edu-gold: #FFB300;
    --edu-gold-dark: #F57F17;
    --edu-gold-light: #FFF8E1;
    --edu-navy: #1A237E;

    /* Semantic mappings */
    --edu-success: #4CAF50;
    --edu-warning: #FF9800;
    --edu-danger: #F44336;
    --edu-info: #00ACC1;

    /* Background tints */
    --edu-bg-primary: #E3F2FD;
    --edu-bg-teal: #E0F7FA;
    --edu-bg-green: #E8F5E9;
    --edu-bg-orange: #FBE9E7;
    --edu-bg-gold: #FFF8E1;
    --edu-bg-surface: #FFFFFF;
    --edu-bg-main: #F5F9FF;

    /* Gradients */
    --edu-gradient-primary: linear-gradient(135deg, #1565C0 0%, #0D47A1 100%);
    --edu-gradient-teal: linear-gradient(135deg, #00ACC1 0%, #00838F 100%);
    --edu-gradient-green: linear-gradient(135deg, #4CAF50 0%, #388E3C 100%);
    --edu-gradient-orange: linear-gradient(135deg, #FF7043 0%, #E64A19 100%);
    --edu-gradient-gold: linear-gradient(135deg, #FFB300 0%, #F57F17 100%);
    --edu-gradient-multi: linear-gradient(135deg, #1565C0 0%, #00ACC1 50%, #4CAF50 100%);
    --edu-gradient-crown: linear-gradient(180deg, #FFB300 0%, #FF8F00 100%);

    /* Shadows */
    --edu-shadow-sm: 0 2px 8px rgba(21, 101, 192, 0.08);
    --edu-shadow: 0 4px 20px rgba(21, 101, 192, 0.12);
    --edu-shadow-lg: 0 8px 40px rgba(21, 101, 192, 0.16);
    --edu-shadow-colored: 0 4px 20px rgba(21, 101, 192, 0.2);

    /* Border Radius */
    --edu-radius-sm: 8px;
    --edu-radius: 14px;
    --edu-radius-lg: 20px;
    --edu-radius-xl: 28px;

    /* Transitions */
    --edu-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);

    /* Typography */
    --edu-font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* ===== EDUTECH BODY OVERRIDE ===== */
body.edutech-page {
    background: var(--edu-bg-main);
    font-family: var(--edu-font-display);
}

/* ===== EDUTECH HEADER ===== */
.edu-header {
    background: var(--edu-gradient-primary);
    border-bottom: none;
    box-shadow: var(--edu-shadow);
}
.edu-header .header-logo {
    color: #fff;
}
.edu-header .header-logo img {
    height: 42px;
    filter: brightness(0) invert(1);
}
.edu-header .header-nav a {
    color: rgba(255,255,255,0.8);
}
.edu-header .header-nav a:hover,
.edu-header .header-nav a.active {
    color: #fff;
}

/* ===== EDUTECH BOTTOM NAV ===== */
.edu-bottom-nav {
    background: #fff;
    border-top: 2px solid var(--edu-primary-lighter);
    box-shadow: 0 -4px 20px rgba(21, 101, 192, 0.1);
}
.edu-bottom-nav .bottom-nav-item.active {
    color: var(--edu-primary);
}
.edu-bottom-nav .bottom-nav-item.active::after {
    background: var(--edu-gradient-primary);
    width: 36px;
    height: 4px;
    border-radius: 0 0 6px 6px;
}
.edu-bottom-nav .bottom-nav-item .badge {
    background: var(--edu-orange);
}

/* ===== EDUTECH BUTTONS ===== */
.btn-edu-primary {
    background: var(--edu-gradient-primary);
    color: #fff;
    border: none;
    box-shadow: 0 4px 15px rgba(21, 101, 192, 0.3);
}
.btn-edu-primary:hover {
    background: var(--edu-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(21, 101, 192, 0.4);
}
.btn-edu-teal {
    background: var(--edu-gradient-teal);
    color: #fff;
    border: none;
    box-shadow: 0 4px 15px rgba(0, 172, 193, 0.3);
}
.btn-edu-teal:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(0, 172, 193, 0.4);
}
.btn-edu-green {
    background: var(--edu-gradient-green);
    color: #fff;
    border: none;
    box-shadow: 0 4px 15px rgba(76, 175, 80, 0.3);
}
.btn-edu-green:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(76, 175, 80, 0.4);
}
.btn-edu-orange {
    background: var(--edu-gradient-orange);
    color: #fff;
    border: none;
    box-shadow: 0 4px 15px rgba(255, 112, 67, 0.3);
}
.btn-edu-orange:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(255, 112, 67, 0.4);
}
.btn-edu-gold {
    background: var(--edu-gradient-gold);
    color: #1A237E;
    border: none;
    font-weight: 700;
    box-shadow: 0 4px 15px rgba(255, 179, 0, 0.3);
}
.btn-edu-gold:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(255, 179, 0, 0.4);
}
.btn-edu-outline {
    background: transparent;
    border: 2px solid var(--edu-primary);
    color: var(--edu-primary);
}
.btn-edu-outline:hover {
    background: var(--edu-primary);
    color: #fff;
}

/* ===== EDUTECH CARDS ===== */
.edu-card {
    background: var(--edu-bg-surface);
    border-radius: var(--edu-radius);
    box-shadow: var(--edu-shadow-sm);
    border: 1px solid rgba(21, 101, 192, 0.08);
    transition: var(--edu-transition);
    overflow: hidden;
}
.edu-card:hover {
    box-shadow: var(--edu-shadow);
    transform: translateY(-2px);
    border-color: rgba(21, 101, 192, 0.15);
}
.edu-card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--edu-primary-lighter);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.edu-card-body {
    padding: 20px;
}
.edu-card-footer {
    padding: 14px 20px;
    border-top: 1px solid var(--edu-primary-lighter);
    background: var(--edu-bg-main);
}

/* ===== EDUTECH STAT CARDS ===== */
.edu-stat-card {
    background: #fff;
    border-radius: var(--edu-radius);
    padding: 20px;
    box-shadow: var(--edu-shadow-sm);
    border-left: 4px solid var(--edu-primary);
    transition: var(--edu-transition);
}
.edu-stat-card:hover {
    box-shadow: var(--edu-shadow);
    transform: translateY(-3px);
}
.edu-stat-card.teal { border-left-color: var(--edu-teal); }
.edu-stat-card.green { border-left-color: var(--edu-green); }
.edu-stat-card.orange { border-left-color: var(--edu-orange); }
.edu-stat-card.gold { border-left-color: var(--edu-gold); }

.edu-stat-card .stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--edu-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
    font-size: 1.5rem;
}
.edu-stat-card .stat-icon.blue { background: var(--edu-bg-primary); color: var(--edu-primary); }
.edu-stat-card .stat-icon.teal { background: var(--edu-bg-teal); color: var(--edu-teal); }
.edu-stat-card .stat-icon.green { background: var(--edu-bg-green); color: var(--edu-green); }
.edu-stat-card .stat-icon.orange { background: var(--edu-bg-orange); color: var(--edu-orange); }
.edu-stat-card .stat-icon.gold { background: var(--edu-bg-gold); color: var(--edu-gold); }

.edu-stat-card .stat-value {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--edu-navy);
    line-height: 1;
}
.edu-stat-card .stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 6px;
}

/* ===== EDUTECH WORKSPACE CARDS ===== */
.edu-workspace-card {
    background: #fff;
    border-radius: var(--edu-radius);
    overflow: hidden;
    box-shadow: var(--edu-shadow-sm);
    transition: var(--edu-transition);
    position: relative;
}
.edu-workspace-card:hover {
    box-shadow: var(--edu-shadow);
    transform: translateY(-4px);
}
.edu-workspace-card .ws-color-bar {
    height: 5px;
    width: 100%;
}
.edu-workspace-card .ws-body {
    padding: 18px;
}
.edu-workspace-card .ws-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--edu-navy);
    margin-bottom: 6px;
}
.edu-workspace-card .ws-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.78rem;
    color: var(--text-secondary);
}
.edu-workspace-card .ws-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
}
.edu-workspace-card .ws-badge.shared {
    background: var(--edu-bg-teal);
    color: var(--edu-teal-dark);
}
.edu-workspace-card .ws-badge.private {
    background: var(--edu-bg-primary);
    color: var(--edu-primary);
}

/* ===== EDUTECH CBT INTERFACE ===== */
.edu-cbt-container {
    background: #fff;
    border-radius: var(--edu-radius-lg);
    box-shadow: var(--edu-shadow);
    overflow: hidden;
}
.edu-cbt-header {
    background: var(--edu-gradient-primary);
    color: #fff;
    padding: 20px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.edu-cbt-timer {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255,255,255,0.15);
    padding: 8px 16px;
    border-radius: var(--edu-radius);
    font-size: 1.1rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}
.edu-cbt-timer.warning {
    background: rgba(255, 112, 67, 0.3);
    animation: timerPulse 1s infinite;
}
.edu-cbt-timer.danger {
    background: rgba(244, 67, 54, 0.4);
    animation: timerPulse 0.5s infinite;
}
@keyframes timerPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}
.edu-cbt-progress-bar {
    height: 6px;
    background: var(--edu-primary-lighter);
    border-radius: 3px;
    overflow: hidden;
    margin: 16px 0;
}
.edu-cbt-progress-fill {
    height: 100%;
    background: var(--edu-gradient-primary);
    border-radius: 3px;
    transition: width 0.4s ease;
}
.edu-question-card {
    padding: 24px;
    min-height: 300px;
}
.edu-question-text {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--edu-navy);
    line-height: 1.6;
    margin-bottom: 24px;
}
.edu-option-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    border: 2px solid var(--border);
    border-radius: var(--edu-radius);
    margin-bottom: 10px;
    cursor: pointer;
    transition: var(--edu-transition);
    background: #fff;
}
.edu-option-item:hover {
    border-color: var(--edu-primary);
    background: var(--edu-bg-primary);
}
.edu-option-item.selected {
    border-color: var(--edu-primary);
    background: var(--edu-bg-primary);
}
.edu-option-item.correct {
    border-color: var(--edu-green);
    background: var(--edu-bg-green);
}
.edu-option-item.wrong {
    border-color: var(--edu-danger);
    background: #FFEBEE;
}
.edu-option-label {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--edu-primary-lighter);
    color: var(--edu-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
    flex-shrink: 0;
}
.edu-option-item.selected .edu-option-label {
    background: var(--edu-primary);
    color: #fff;
}
.edu-option-item.correct .edu-option-label {
    background: var(--edu-green);
    color: #fff;
}
.edu-option-item.wrong .edu-option-label {
    background: var(--edu-danger);
    color: #fff;
}

/* Question Navigation Grid */
.edu-qnav-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 8px;
    padding: 16px;
}
.edu-qnav-btn {
    aspect-ratio: 1;
    border-radius: var(--edu-radius-sm);
    border: 2px solid var(--border);
    background: #fff;
    font-weight: 700;
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--edu-transition);
    display: flex;
    align-items: center;
    justify-content: center;
}
.edu-qnav-btn:hover {
    border-color: var(--edu-primary);
}
.edu-qnav-btn.current {
    border-color: var(--edu-primary);
    background: var(--edu-primary);
    color: #fff;
}
.edu-qnav-btn.answered {
    border-color: var(--edu-green);
    background: var(--edu-bg-green);
    color: var(--edu-green-dark);
}
.edu-qnav-btn.skipped {
    border-color: var(--edu-orange);
    background: var(--edu-bg-orange);
    color: var(--edu-orange-dark);
}

/* ===== EDUTECH AI WORKSPACE ===== */
.edu-ai-chat-container {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 140px);
    background: var(--edu-bg-main);
    border-radius: var(--edu-radius);
    overflow: hidden;
}
.edu-ai-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.edu-ai-message {
    display: flex;
    gap: 12px;
    max-width: 85%;
    animation: messageSlide 0.3s ease;
}
@keyframes messageSlide {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
.edu-ai-message.user {
    align-self: flex-end;
    flex-direction: row-reverse;
}
.edu-ai-message .msg-avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1.1rem;
}
.edu-ai-message.user .msg-avatar {
    background: var(--edu-gradient-primary);
    color: #fff;
}
.edu-ai-message.bot .msg-avatar {
    background: var(--edu-gradient-teal);
    color: #fff;
}
.edu-ai-message .msg-bubble {
    padding: 14px 18px;
    border-radius: var(--edu-radius);
    font-size: 0.9rem;
    line-height: 1.6;
    box-shadow: var(--edu-shadow-sm);
}
.edu-ai-message.user .msg-bubble {
    background: var(--edu-gradient-primary);
    color: #fff;
    border-radius: var(--edu-radius) var(--edu-radius) 4px var(--edu-radius);
}
.edu-ai-message.bot .msg-bubble {
    background: #fff;
    color: var(--text-primary);
    border-radius: var(--edu-radius) var(--edu-radius) var(--edu-radius) 4px;
    border: 1px solid rgba(21, 101, 192, 0.1);
}
.edu-ai-message.bot .msg-bubble .citation {
    display: inline-block;
    background: var(--edu-bg-gold);
    color: var(--edu-gold-dark);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    margin: 0 2px;
    text-decoration: none;
}
.edu-ai-message.bot .msg-bubble .citation:hover {
    background: var(--edu-gold);
    color: #fff;
}
.edu-ai-input-area {
    padding: 16px 20px;
    background: #fff;
    border-top: 1px solid var(--edu-primary-lighter);
    display: flex;
    gap: 12px;
    align-items: flex-end;
}
.edu-ai-input {
    flex: 1;
    border: 2px solid var(--border);
    border-radius: var(--edu-radius);
    padding: 12px 16px;
    font-size: 0.9rem;
    resize: none;
    min-height: 48px;
    max-height: 120px;
    transition: var(--edu-transition);
}
.edu-ai-input:focus {
    border-color: var(--edu-primary);
    box-shadow: 0 0 0 3px rgba(21, 101, 192, 0.1);
    outline: none;
}
.edu-ai-send-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--edu-gradient-primary);
    color: #fff;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--edu-transition);
    flex-shrink: 0;
}
.edu-ai-send-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(21, 101, 192, 0.4);
}
.edu-ai-send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* ===== EDUTECH FLASHCARD ===== */
.edu-flashcard {
    perspective: 1000px;
    width: 100%;
    max-width: 500px;
    height: 280px;
    margin: 0 auto;
    cursor: pointer;
}
.edu-flashcard-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.6s;
    transform-style: preserve-3d;
    border-radius: var(--edu-radius-lg);
}
.edu-flashcard.flipped .edu-flashcard-inner {
    transform: rotateY(180deg);
}
.edu-flashcard-front,
.edu-flashcard-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: var(--edu-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    text-align: center;
    box-shadow: var(--edu-shadow);
}
.edu-flashcard-front {
    background: linear-gradient(135deg, #fff 0%, var(--edu-bg-primary) 100%);
    border: 2px solid var(--edu-primary);
    color: var(--edu-navy);
    font-size: 1.2rem;
    font-weight: 600;
}
.edu-flashcard-back {
    background: linear-gradient(135deg, #fff 0%, var(--edu-bg-teal) 100%);
    border: 2px solid var(--edu-teal);
    color: var(--edu-navy);
    font-size: 1.1rem;
    transform: rotateY(180deg);
}

/* ===== EDUTECH SUBSCRIPTION BADGE ===== */
.edu-sub-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
}
.edu-sub-badge.active {
    background: var(--edu-bg-green);
    color: var(--edu-green-dark);
}
.edu-sub-badge.expired {
    background: var(--edu-bg-orange);
    color: var(--edu-orange-dark);
}
.edu-sub-badge.locked {
    background: #FFEBEE;
    color: #C62828;
}

/* ===== EDUTECH COMMUNITY LOCKED OVERLAY ===== */
.edu-locked-overlay {
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,0.92);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    border-radius: var(--edu-radius);
    z-index: 10;
}
.edu-locked-overlay .lock-icon {
    font-size: 3rem;
    color: var(--edu-gold);
}
.edu-locked-overlay h3 {
    color: var(--edu-navy);
    font-size: 1.2rem;
}
.edu-locked-overlay p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-align: center;
    max-width: 300px;
}

/* ===== EDUTECH SUBJECT COLOR CODING ===== */
.edu-subject-mathematics { --subject-color: #1565C0; --subject-bg: #E3F2FD; }
.edu-subject-english { --subject-color: #E91E63; --subject-bg: #FCE4EC; }
.edu-subject-science { --subject-color: #00ACC1; --subject-bg: #E0F7FA; }
.edu-subject-social_studies { --subject-color: #FF9800; --subject-bg: #FFF3E0; }
.edu-subject-arts { --subject-color: #9C27B0; --subject-bg: #F3E5F5; }
.edu-subject-commercial { --subject-color: #795548; --subject-bg: #EFEBE9; }
.edu-subject-technology { --subject-color: #607D8B; --subject-bg: #ECEFF1; }
.edu-subject-languages { --subject-color: #4CAF50; --subject-bg: #E8F5E9; }
.edu-subject-religious_studies { --subject-color: #3F51B5; --subject-bg: #E8EAF6; }
.edu-subject-others { --subject-color: #757575; --subject-bg: #F5F5F5; }

/* ===== EDUTECH LOADING SPINNER ===== */
.edu-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--edu-primary-lighter);
    border-top-color: var(--edu-primary);
    border-radius: 50%;
    animation: eduSpin 0.8s linear infinite;
}
@keyframes eduSpin {
    to { transform: rotate(360deg); }
}

/* ===== EDUTECH ANIMATED GRADIENT BACKGROUND ===== */
.edu-animated-bg {
    background: linear-gradient(-45deg, #1565C0, #00ACC1, #4CAF50, #FFB300);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
}
@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* ===== EDUTECH PAGE HEADER ===== */
.edu-page-header {
    background: var(--edu-gradient-primary);
    padding: 32px 20px;
    color: #fff;
    margin-bottom: 24px;
}
.edu-page-header h1 {
    color: #fff;
    font-size: 1.5rem;
    margin-bottom: 6px;
}
.edu-page-header p {
    color: rgba(255,255,255,0.8);
    font-size: 0.9rem;
}

/* ===== EDUTECH TABS ===== */
.edu-tabs {
    display: flex;
    gap: 4px;
    background: #fff;
    padding: 6px;
    border-radius: var(--edu-radius);
    box-shadow: var(--edu-shadow-sm);
    margin-bottom: 20px;
}
.edu-tab {
    flex: 1;
    padding: 10px 16px;
    text-align: center;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-secondary);
    border-radius: var(--edu-radius-sm);
    cursor: pointer;
    transition: var(--edu-transition);
    border: none;
    background: transparent;
}
.edu-tab:hover {
    color: var(--edu-primary);
    background: var(--edu-bg-primary);
}
.edu-tab.active {
    background: var(--edu-gradient-primary);
    color: #fff;
    box-shadow: 0 2px 8px rgba(21, 101, 192, 0.3);
}

/* ===== EDUTECH FORM STYLES ===== */
.edu-form-input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: var(--edu-radius);
    font-size: 0.9rem;
    transition: var(--edu-transition);
    background: #fff;
}
.edu-form-input:focus {
    border-color: var(--edu-primary);
    box-shadow: 0 0 0 3px rgba(21, 101, 192, 0.1);
    outline: none;
}
.edu-form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--edu-navy);
    margin-bottom: 6px;
}

/* ===== EDUTECH TOASTS ===== */
.edu-toast {
    border-left: 4px solid var(--edu-primary);
    background: #fff;
    color: var(--text-primary);
}
.edu-toast.success { border-left-color: var(--edu-green); }
.edu-toast.error { border-left-color: var(--edu-danger); }
.edu-toast.warning { border-left-color: var(--edu-gold); }

/* ===== EDUTECH MODAL ===== */
.edu-modal-overlay {
    background: rgba(13, 71, 161, 0.5);
    backdrop-filter: blur(4px);
}
.edu-modal-content {
    border-radius: var(--edu-radius-lg);
    box-shadow: var(--edu-shadow-lg);
}

/* ===== EDUTECH HERO SECTION ===== */
.edu-hero {
    background: var(--edu-gradient-primary);
    padding: 48px 20px 56px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.edu-hero::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -10%;
    width: 400px;
    height: 400px;
    background: rgba(255,255,255,0.05);
    border-radius: 50%;
}
.edu-hero::after {
    content: '';
    position: absolute;
    bottom: -20%;
    left: -10%;
    width: 300px;
    height: 300px;
    background: rgba(255, 179, 0, 0.1);
    border-radius: 50%;
}
.edu-hero-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
    margin: 0 auto;
}
.edu-hero h1 {
    color: #fff;
    font-size: clamp(1.8rem, 5vw, 2.6rem);
    margin-bottom: 12px;
}
.edu-hero p {
    color: rgba(255,255,255,0.85);
    font-size: 1.05rem;
    margin-bottom: 28px;
}

/* ===== EDUTECH LANDING PROMO SECTION ===== */
.edu-promo-section {
    background: linear-gradient(135deg, #E3F2FD 0%, #E0F7FA 50%, #E8F5E9 100%);
    padding: 40px 20px;
    border-radius: var(--edu-radius-lg);
    margin: 24px 0;
    position: relative;
    overflow: hidden;
}
.edu-promo-section::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 200px;
    height: 200px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Ccircle cx='80' cy='20' r='60' fill='rgba(21,101,192,0.05)'/%3E%3C/svg%3E") no-repeat;
    background-size: contain;
}
.edu-promo-section .edu-promo-logo {
    height: 80px;
    margin-bottom: 16px;
}
.edu-promo-section h2 {
    color: var(--edu-primary);
    font-size: 1.5rem;
    margin-bottom: 10px;
}
.edu-promo-section p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    max-width: 500px;
    margin: 0 auto 20px;
}
.edu-promo-features {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-bottom: 24px;
}
.edu-promo-feature {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: #fff;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--edu-navy);
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.edu-promo-feature svg {
    width: 16px;
    height: 16px;
    color: var(--edu-primary);
}

/* ===== EDUTECH FOOTER ===== */
.edu-footer {
    background: linear-gradient(135deg, #0D47A1 0%, #1A237E 100%);
    color: #fff;
    padding: 32px 20px;
    text-align: center;
    margin-bottom: 60px;
}
.edu-footer p {
    color: rgba(255,255,255,0.7);
    font-size: 0.85rem;
}

/* ===== RESPONSIVE ===== */
@media (min-width: 768px) {
    .edu-qnav-grid {
        grid-template-columns: repeat(10, 1fr);
    }
    .edu-ai-chat-container {
        height: calc(100vh - 80px);
    }
    .edu-page-header {
        padding: 40px 32px;
    }
    .edu-page-header h1 {
        font-size: 1.8rem;
    }
}

@media (min-width: 1024px) {
    .edu-bottom-nav {
        display: none;
    }
    .edu-footer {
        margin-bottom: 0;
    }
    .edu-ai-chat-container {
        height: calc(100vh - 70px);
    }
}

/* ===== PRINT STYLES ===== */
@media print {
    .edu-bottom-nav, .edu-header { display: none !important; }
    .edu-card { box-shadow: none; border: 1px solid #ddd; }
}