/**
 * IB Math Master — IA Guide Page
 * File: assets/css/ia-guide.css
 * Loaded conditionally on /ib-math-internal-assessment/ via is_page()
 *
 * Dependencies: tokens.css (variables), shared.css (FAQ, CTA, buttons)
 * Astra owns: body, h1-h6 base sizes, links, primary buttons, container
 * Prefix: iag- to avoid collisions
 */


/* =========================================
   HERO — Navy Gradient
   ========================================= */

.iag-hero {
    background: linear-gradient(135deg, #0a1f45 0%, var(--ib-navy) 40%, #163566 100%);
    overflow: hidden;
    padding: 100px 0 90px;
    position: relative;
}

.iag-hero::before {
    background: radial-gradient(circle, rgba(56, 189, 248, 0.08) 0%, transparent 70%);
    border-radius: var(--ib-radius-circle);
    content: '';
    height: 350px;
    position: absolute;
    right: -80px;
    top: -80px;
    width: 350px;
}

.iag-hero::after {
    background: radial-gradient(circle, rgba(56, 189, 248, 0.05) 0%, transparent 70%);
    border-radius: var(--ib-radius-circle);
    bottom: -40px;
    content: '';
    height: 200px;
    left: 20%;
    position: absolute;
    width: 200px;
}

.iag-hero-fade {
    background: linear-gradient(180deg, transparent 60%, rgba(10, 31, 69, 0.4) 100%);
    bottom: 0;
    left: 0;
    position: absolute;
    right: 0;
    top: 0;
}

.iag-hero-grid {
    align-items: center;
    display: grid;
    gap: var(--ib-space-64, 64px);
    grid-template-columns: 1fr 380px;
    position: relative;
    z-index: 1;
}

.iag-hero-tag {
    background: rgba(56, 189, 248, 0.12);
    border-radius: 6px;
    color: #7dd3fc;
    display: inline-block;
    font-size: var(--ib-font-size-sm);
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: var(--ib-space-20);
    padding: var(--ib-space-6) var(--ib-space-16);
    text-transform: uppercase;
}

.iag-hero h1 {
    color: var(--ib-white);
    font-size: 44px;
    font-weight: 800;
    line-height: 1.15;
    margin: 0 0 var(--ib-space-20);
}

.iag-hero h1 span {
    color: var(--ib-accent);
}

.iag-hero-sub {
    color: rgba(255, 255, 255, 0.75);
    font-size: var(--ib-font-size-lg);
    line-height: 1.65;
    margin-bottom: var(--ib-space-28);
    max-width: 480px;
}

.iag-hero-badges {
    align-items: center;
    display: flex;
    gap: var(--ib-space-12);
}

.iag-hero-badge {
    align-items: center;
    background: rgba(255, 255, 255, 0.08);
    border-radius: var(--ib-radius-pill);
    color: rgba(255, 255, 255, 0.55);
    display: inline-flex;
    font-size: 14px;
    font-weight: 500;
    gap: var(--ib-space-6);
    padding: var(--ib-space-6) var(--ib-space-14);
}


/* =========================================
   HERO CARD — Criteria overview
   ========================================= */

.iag-hero-card {
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.06);
    border-radius: var(--ib-radius-md);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--ib-space-32) var(--ib-space-28);
}

.iag-hero-card-label {
    color: rgba(255, 255, 255, 0.5);
    font-size: var(--ib-font-size-xs);
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: var(--ib-space-20);
    text-transform: uppercase;
}

.iag-hero-card-row {
    align-items: center;
    display: flex;
    justify-content: space-between;
    padding: var(--ib-space-12) 0;
}

.iag-hero-card-row:not(:last-of-type) {
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.iag-hero-card-left {
    align-items: center;
    display: flex;
    gap: var(--ib-space-12);
}

.iag-hero-letter {
    align-items: center;
    border-radius: 6px;
    display: flex;
    font-size: var(--ib-font-size-xs);
    font-weight: 800;
    height: 28px;
    justify-content: center;
    width: 28px;
}

.iag-hero-letter--navy { background: rgba(15, 42, 92, 0.15); color: #38bdf8; }
.iag-hero-letter--sky  { background: rgba(56, 189, 248, 0.15); color: #38bdf8; }
.iag-hero-letter--purple { background: rgba(139, 92, 246, 0.15); color: #8b5cf6; }
.iag-hero-letter--green { background: rgba(16, 185, 129, 0.15); color: #10b981; }
.iag-hero-letter--amber { background: rgba(245, 158, 11, 0.15); color: #f59e0b; }

.iag-hero-card-name {
    color: rgba(255, 255, 255, 0.85);
    font-size: var(--ib-font-size-base, 15px);
    font-weight: 500;
}

.iag-hero-card-marks {
    font-size: 14px;
    font-weight: 700;
}

.iag-hero-card-marks--sky { color: #38bdf8; }
.iag-hero-card-marks--purple { color: #8b5cf6; }
.iag-hero-card-marks--green { color: #10b981; }
.iag-hero-card-marks--amber { color: #f59e0b; }

.iag-hero-card-total {
    align-items: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    margin-top: var(--ib-space-16);
    padding-top: var(--ib-space-16);
}

.iag-hero-card-total-label {
    color: rgba(255, 255, 255, 0.5);
    font-size: var(--ib-font-size-sm);
    font-weight: 600;
}

.iag-hero-card-total-value {
    color: var(--ib-white);
    font-size: var(--ib-font-size-xl);
    font-weight: 800;
}


/* =========================================
   SECTION BACKGROUNDS
   ========================================= */

.iag-section {
    border-bottom: 1px solid var(--ib-border);
    padding: var(--ib-section-pad) 0;
}

.iag-section--light {
    background: var(--ib-light);
}


/* =========================================
   SECTION 2: What Is the IA?
   ========================================= */

.iag-what-grid {
    align-items: start;
    display: grid;
    gap: var(--ib-space-64, 64px);
    grid-template-columns: 1fr 380px;
}

.iag-what-grid h2 {
    color: var(--ib-navy);
    font-size: 32px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--ib-space-20);
}

.iag-what-grid p {
    color: var(--ib-text-secondary);
    font-size: var(--ib-font-size-md);
    line-height: 1.75;
    margin-bottom: var(--ib-space-16);
}

.iag-what-grid p:last-child {
    margin-bottom: 0;
}

.iag-glance {
    background: var(--ib-light);
    border-radius: var(--ib-radius-sm);
    border: 1px solid var(--ib-border);
    padding: var(--ib-space-32) var(--ib-space-28);
}

.iag-glance-label {
    color: var(--ib-text-muted);
    font-size: var(--ib-font-size-xs);
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: var(--ib-space-20);
    text-transform: uppercase;
}

.iag-glance-row {
    align-items: baseline;
    display: flex;
    flex-wrap: wrap;
    gap: 4px var(--ib-space-12);
    justify-content: space-between;
    padding: var(--ib-space-12) 0;
}

.iag-glance-row:not(:last-child) {
    border-bottom: 1px solid var(--ib-border);
}

.iag-glance-row-label {
    color: var(--ib-text-muted);
    flex-shrink: 0;
    font-size: 14px;
    font-weight: 600;
}

.iag-glance-row-value {
    color: var(--ib-navy);
    font-size: 14px;
    font-weight: 600;
    text-align: right;
}


/* =========================================
   SECTION 3: Five Criteria
   ========================================= */

.iag-criteria {
    background: linear-gradient(180deg, #f0f9ff 0%, var(--ib-light) 50%, var(--ib-white) 100%);
    border-bottom: 1px solid var(--ib-accent-softer);
    padding: var(--ib-section-pad) 0;
}

.iag-criteria-header {
    margin: 0 auto var(--ib-space-48, 48px);
    max-width: 700px;
    text-align: center;
}

.iag-criteria-header h2 {
    color: var(--ib-navy);
    font-size: 32px;
    font-weight: 800;
    margin-bottom: var(--ib-space-14);
}

.iag-criteria-header h2 span {
    color: var(--ib-accent-hover);
}

.iag-criteria-header p {
    color: var(--ib-text-muted);
    font-size: var(--ib-font-size-md);
    line-height: 1.7;
}

.iag-criterion {
    background: var(--ib-white);
    border-radius: var(--ib-radius-sm);
    border: 1px solid var(--ib-border);
    box-shadow: var(--ib-shadow-xs);
    margin-bottom: var(--ib-space-20, 20px);
    overflow: hidden;
    padding: var(--ib-space-36, 36px) var(--ib-space-32, 32px);
    position: relative;
}

.iag-criterion:last-of-type {
    margin-bottom: 0;
}

.iag-criterion::before {
    content: '';
    height: 3px;
    left: 0;
    position: absolute;
    top: 0;
    width: 100%;
}

.iag-criterion--navy::before  { background: #0f2a5c; }
.iag-criterion--sky::before   { background: #0ea5e9; }
.iag-criterion--purple::before { background: #8b5cf6; }
.iag-criterion--green::before  { background: #10b981; }
.iag-criterion--amber::before  { background: #f59e0b; }

.iag-criterion-inner {
    display: grid;
    gap: var(--ib-space-32);
    grid-template-columns: 200px 1fr;
}

.iag-criterion-meta {
    align-items: center;
    display: flex;
    gap: var(--ib-space-10);
    margin-bottom: var(--ib-space-8);
}

.iag-criterion-letter {
    align-items: center;
    border-radius: var(--ib-radius-xs);
    display: flex;
    font-size: var(--ib-font-size-md);
    font-weight: 800;
    height: 36px;
    justify-content: center;
    width: 36px;
}

.iag-criterion-letter--navy  { background: rgba(15, 42, 92, 0.1); color: #0f2a5c; }
.iag-criterion-letter--sky   { background: rgba(14, 165, 233, 0.1); color: #0ea5e9; }
.iag-criterion-letter--purple { background: rgba(139, 92, 246, 0.1); color: #8b5cf6; }
.iag-criterion-letter--green  { background: rgba(16, 185, 129, 0.1); color: #10b981; }
.iag-criterion-letter--amber  { background: rgba(245, 158, 11, 0.1); color: #f59e0b; }

.iag-criterion-pill {
    border-radius: var(--ib-radius-pill, 50px);
    font-size: var(--ib-font-size-xs, 12px);
    font-weight: 700;
    padding: var(--ib-space-4, 4px) var(--ib-space-12, 12px);
}

.iag-criterion-pill--navy  { background: rgba(15, 42, 92, 0.08); color: #0f2a5c; }
.iag-criterion-pill--sky   { background: rgba(14, 165, 233, 0.1); color: #0ea5e9; }
.iag-criterion-pill--purple { background: rgba(139, 92, 246, 0.1); color: #7c3aed; }
.iag-criterion-pill--green  { background: rgba(16, 185, 129, 0.1); color: #059669; }
.iag-criterion-pill--amber  { background: rgba(245, 158, 11, 0.1); color: #d97706; }

.iag-criterion-title {
    color: var(--ib-navy);
    font-size: var(--ib-font-size-xl);
    font-weight: 700;
    margin: 0;
}

.iag-criterion-body p {
    color: var(--ib-text-secondary);
    font-size: var(--ib-font-size-base);
    line-height: 1.7;
    margin: 0 0 var(--ib-space-14);
}

.iag-criterion-body p:last-child {
    margin-bottom: 0;
}

.iag-criterion-body strong {
    color: var(--ib-navy);
}

.iag-diff--navy  { color: #0f2a5c; }
.iag-diff--sky   { color: #0ea5e9; }
.iag-diff--purple { color: #8b5cf6; }
.iag-diff--green  { color: #10b981; }
.iag-diff--amber  { color: #f59e0b; }


/* =========================================
   SECTION 4: Where Marks Are Lost
   ========================================= */

.iag-marks-grid {
    align-items: start;
    display: grid;
    gap: var(--ib-space-64, 64px);
    grid-template-columns: 1fr 1fr;
}

.iag-marks-grid h2 {
    color: var(--ib-navy);
    font-size: 32px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--ib-space-16, 16px);
}

.iag-marks-grid h2 span {
    color: var(--ib-accent-hover);
}

.iag-marks-prose p {
    color: var(--ib-text-secondary);
    font-size: var(--ib-font-size-md);
    line-height: 1.75;
    margin-bottom: var(--ib-space-20);
}

.iag-marks-prose p:last-child {
    margin-bottom: 0;
}

.iag-issue-cards {
    display: flex;
    flex-direction: column;
    gap: var(--ib-space-16);
}

.iag-issue-card {
    align-items: flex-start;
    background: var(--ib-light);
    border-radius: var(--ib-radius-xs);
    border: 1px solid var(--ib-border);
    display: flex;
    gap: var(--ib-space-16);
    padding: var(--ib-space-20) 22px;
}

.iag-issue-icon {
    align-items: center;
    background: #fef2f2;
    border-radius: var(--ib-radius-xs);
    border: 1px solid #fecaca;
    color: #dc2626;
    display: flex;
    flex-shrink: 0;
    font-size: var(--ib-font-size-xs);
    font-weight: 800;
    height: 36px;
    justify-content: center;
    width: 36px;
}

.iag-issue-label {
    color: var(--ib-navy);
    font-size: 14px;
    font-weight: 700;
    margin-bottom: var(--ib-space-4);
}

.iag-issue-text {
    color: var(--ib-text-muted);
    font-size: 14px;
    line-height: 1.6;
    margin: 0;
}


/* =========================================
   SECTION 5: Why It's Hard
   ========================================= */

.iag-hard-header {
    margin: 0 auto var(--ib-space-48);
    max-width: var(--ib-content-narrow);
    text-align: center;
}

.iag-hard-header h2 {
    color: var(--ib-navy);
    font-size: 32px;
    font-weight: 800;
    margin-bottom: var(--ib-space-14);
}

.iag-hard-header p {
    color: var(--ib-text-muted);
    font-size: var(--ib-font-size-md);
    line-height: 1.7;
}

.iag-reason-grid {
    display: grid;
    gap: var(--ib-space-20, 20px);
    grid-template-columns: 1fr 1fr 1fr;
}

.iag-reason-card {
    background: var(--ib-white);
    border-radius: var(--ib-radius-sm);
    border: 1px solid var(--ib-border);
    overflow: hidden;
    padding: var(--ib-space-32) var(--ib-space-28);
    position: relative;
}

.iag-reason-card::before {
    background: linear-gradient(90deg, var(--ib-navy), var(--ib-accent));
    content: '';
    height: 3px;
    left: 0;
    position: absolute;
    top: 0;
    width: 100%;
}

.iag-reason-icon {
    align-items: center;
    background: linear-gradient(135deg, var(--ib-navy), var(--ib-navy-light));
    border-radius: var(--ib-radius-xs);
    color: var(--ib-accent);
    display: flex;
    font-size: var(--ib-font-size-lg);
    font-weight: 800;
    height: 44px;
    justify-content: center;
    margin-bottom: var(--ib-space-16);
    width: 44px;
}

.iag-reason-card h3 {
    color: var(--ib-navy);
    font-size: var(--ib-font-size-lg);
    font-weight: 700;
    margin-bottom: var(--ib-space-10);
}

.iag-reason-card p {
    color: var(--ib-text-muted);
    font-size: var(--ib-font-size-base);
    line-height: 1.7;
    margin: 0;
}


/* =========================================
   FAQ ACCENT BAR
   (FAQ structure from shared.css)
   ========================================= */

.iag-faq-accent {
    background: var(--ib-accent);
    border-radius: 2px;
    height: 3px;
    margin-top: var(--ib-space-20);
    width: 48px;
}


/* =========================================
   BRIDGE CTA — Light card style
   ========================================= */

.iag-bridge {
    border-top: 1px solid var(--ib-border);
    padding: 72px 0;
}

.iag-bridge-card {
    background: var(--ib-accent-bg);
    border-radius: var(--ib-radius-md);
    border: 1px solid var(--ib-accent-soft);
    margin: 0 auto;
    max-width: 720px;
    padding: var(--ib-space-48) var(--ib-space-40);
    text-align: center;
}

.iag-bridge-card h2 {
    color: var(--ib-navy);
    font-size: 28px;
    font-weight: 800;
    margin-bottom: var(--ib-space-14);
}

.iag-bridge-card p {
    color: var(--ib-text-secondary);
    font-size: var(--ib-font-size-md);
    line-height: 1.7;
    margin: 0 auto var(--ib-space-28);
    max-width: 520px;
}

.iag-bridge-links {
    color: var(--ib-text-muted);
    font-size: var(--ib-font-size-sm);
    margin: var(--ib-space-20) auto 0;
    max-width: 520px;
}

.iag-bridge-links a {
    color: var(--ib-accent-hover);
    font-weight: 500;
    text-decoration: none;
}

.iag-bridge-links a:hover {
    text-decoration: underline;
}


/* =========================================
   RESPONSIVE — 1024px
   ========================================= */

@media (max-width: 1024px) {
    .iag-hero-grid {
        gap: var(--ib-space-40, 40px);
        grid-template-columns: 1fr;
    }

    .iag-hero-card {
        max-width: 420px;
    }

    .iag-what-grid,
    .iag-marks-grid {
        gap: var(--ib-space-40, 40px);
        grid-template-columns: 1fr;
    }

    .iag-criterion-inner {
        gap: var(--ib-space-12, 12px);
        grid-template-columns: 1fr;
    }

    .iag-reason-grid {
        grid-template-columns: 1fr;
    }
}


/* =========================================
   RESPONSIVE — 768px
   ========================================= */

@media (max-width: 768px) {
    .iag-hero {
        padding: 72px 0 56px;
    }

    .iag-hero h1 {
        font-size: 32px;
    }

    .iag-hero-badges {
        flex-wrap: wrap;
    }

    .iag-bridge-card {
        padding: var(--ib-space-36) var(--ib-space-24);
    }
}