/**
 * pages/homepage.css — Homepage elevation layer
 * Phase 2 Visual Design Elevation
 *
 * Design philosophy: ENHANCE, don't replace. The existing CSS already has
 * sophisticated category-aware hover states for cards. We add polish where
 * the site lacks it: hero mesh gradient, typography optical tuning, button
 * shimmer, form focus glow, section dividers, branded scrollbar.
 *
 * Everything is scoped to body.index-page so other pages stay untouched.
 * Rules are unlayered so they compete with existing CSS via source order.
 */

/* ============================================================
   HERO — Mesh gradient + noise texture (anti-AI aesthetic)
   The existing hero::before is a single radial gradient that animates.
   We replace it with a richer multi-layer mesh and add a noise overlay.
   ============================================================ */
body.index-page .hero-section {
    position: relative;
    isolation: isolate;
}

body.index-page .hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    background-image:
        radial-gradient(ellipse 80% 50% at 20% 30%, rgba(168, 85, 247, 0.14) 0%, transparent 60%),
        radial-gradient(ellipse 60% 40% at 80% 20%, rgba(78, 205, 196, 0.09) 0%, transparent 60%),
        radial-gradient(ellipse 50% 60% at 50% 85%, rgba(236, 72, 153, 0.07) 0%, transparent 60%),
        radial-gradient(ellipse 40% 30% at 90% 70%, rgba(245, 158, 11, 0.05) 0%, transparent 60%);
    border-radius: inherit;
    animation: none;
}

body.index-page .hero-section::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    opacity: 0.035;
    mix-blend-mode: overlay;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
    background-size: 200px 200px;
    border-radius: inherit;
}

/* Ensure hero content sits above decorative pseudo elements */
body.index-page .hero-section>* {
    position: relative;
    z-index: 1;
}

/* ============================================================
   TYPOGRAPHY OPTICAL TUNING — heading polish
   ============================================================ */
body.index-page h1 {
    letter-spacing: -0.03em;
    text-wrap: balance;
    font-feature-settings: 'kern' 1, 'liga' 1, 'ss01' 1, 'cv01' 1;
}

body.index-page h2 {
    letter-spacing: -0.02em;
    text-wrap: balance;
    font-feature-settings: 'kern' 1, 'liga' 1;
}

body.index-page h3 {
    letter-spacing: -0.01em;
    text-wrap: balance;
}

body.index-page p {
    text-wrap: pretty;
}

body.index-page .hero-text h1 {
    font-feature-settings: 'kern' 1, 'liga' 1, 'ss01' 1;
    -webkit-font-smoothing: antialiased;
    letter-spacing: -0.035em;
}

body.index-page .hero-text p {
    letter-spacing: 0.005em;
    text-wrap: pretty;
    max-width: 56ch;
}

/* Eyebrow labels — uppercase tracked out for authority */
body.index-page .stat-label {
    letter-spacing: 0.08em;
}

/* Tabular numbers for stats */
body.index-page .stat-number {
    letter-spacing: -0.02em;
    font-variant-numeric: tabular-nums;
}

/* ============================================================
   SECTION TRANSITIONS — subtle gradient divider between sections
   ============================================================ */
body.index-page section.section:not(.hero-section):not(:first-of-type) {
    position: relative;
}

body.index-page section.section:not(.hero-section):not(:first-of-type)::before {
    content: '';
    position: absolute;
    top: 0;
    left: 18%;
    right: 18%;
    height: 1px;
    background: linear-gradient(90deg,
            transparent 0%,
            rgba(168, 85, 247, 0.12) 25%,
            rgba(78, 205, 196, 0.12) 75%,
            transparent 100%);
    pointer-events: none;
    opacity: 0.7;
}

/* ============================================================
   CTA BUTTONS — shimmer sweep on hover (premium feel)
   The existing .cta-button has its own ::before. We add a ::after
   for the shimmer overlay so we don't conflict with the existing pseudo.
   ============================================================ */
body.index-page .cta-button {
    position: relative;
    overflow: hidden;
}

body.index-page .cta-button::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(120deg,
            transparent 30%,
            rgba(255, 255, 255, 0.18) 50%,
            transparent 70%);
    transform: translateX(-110%);
    transition: transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    pointer-events: none;
    z-index: 1;
}

body.index-page .cta-button:hover::after {
    transform: translateX(110%);
}

/* Keep button content above the shimmer overlay */
body.index-page .cta-button>* {
    position: relative;
    z-index: 2;
}

/* ============================================================
   FORM INPUTS — branded purple focus glow
   ============================================================ */
body.index-page #contact input:not([type="submit"]):not([type="radio"]):not([type="checkbox"]):focus,
body.index-page #contact textarea:focus,
body.index-page #contact select:focus,
body.index-page .try-coding-section input:not([type="submit"]):not([type="radio"]):not([type="checkbox"]):focus,
body.index-page .try-coding-section textarea:focus,
body.index-page .try-coding-section select:focus {
    border-color: rgba(168, 85, 247, 0.7) !important;
    box-shadow:
        0 0 0 3px rgba(168, 85, 247, 0.16),
        0 4px 24px rgba(168, 85, 247, 0.1) !important;
    outline: none !important;
}

/* ============================================================
   POPULAR COURSE CHIPS — refined hover with branded glow
   ============================================================ */
body.index-page .course-chip {
    transition:
        transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1),
        box-shadow 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94),
        border-color 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

body.index-page .course-chip:hover {
    transform: translateY(-3px) scale(1.02);
}

body.index-page .course-chip:active {
    transform: translateY(-1px) scale(0.99);
    transition-duration: 0.1s;
}

/* ============================================================
   STATS — refined hover lift
   ============================================================ */
body.index-page .stat-item {
    transition:
        transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1),
        box-shadow 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

body.index-page .stat-item:hover {
    transform: translateY(-3px);
}

/* ============================================================
   SKIP LINK — visible on focus for accessibility
   ============================================================ */
body.index-page .skip-link {
    position: absolute;
    top: -200%;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #7c3aed, #a855f7);
    color: #fff;
    padding: 0.75rem 1.5rem;
    border-radius: 0 0 1rem 1rem;
    font-weight: 600;
    font-size: 0.875rem;
    letter-spacing: 0.02em;
    z-index: 9999;
    text-decoration: none;
    transition: top 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

body.index-page .skip-link:focus {
    top: 0;
    outline: 2px solid #fff;
    outline-offset: 2px;
}

/* ============================================================
   SCROLLBAR — slimmer, branded
   ============================================================ */
body.index-page::-webkit-scrollbar {
    width: 10px;
}

body.index-page::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.3);
}

body.index-page::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, rgba(168, 85, 247, 0.4), rgba(78, 205, 196, 0.35));
    border-radius: 5px;
    border: 2px solid transparent;
    background-clip: padding-box;
}

body.index-page::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, rgba(168, 85, 247, 0.6), rgba(78, 205, 196, 0.5));
    background-clip: padding-box;
}

/* ============================================================
   ::SELECTION — branded text selection
   ============================================================ */
body.index-page ::selection {
    background: rgba(168, 85, 247, 0.4);
    color: #fff;
}

body.index-page ::-moz-selection {
    background: rgba(168, 85, 247, 0.4);
    color: #fff;
}

/* ============================================================
   PHASE 4 — BACK-TO-TOP BUTTON
   ============================================================ */
#mac-back-to-top {
    position: fixed;
    right: clamp(1rem, 3vw, 2rem);
    bottom: clamp(6.5rem, 12vw, 8.5rem);
    width: 48px;
    height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    background: linear-gradient(135deg, #7c3aed 0%, #a855f7 50%, #c084fc 100%);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 50%;
    box-shadow:
        0 8px 24px rgba(0, 0, 0, 0.35),
        0 0 30px rgba(168, 85, 247, 0.35);
    cursor: pointer;
    z-index: 9998;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px) scale(0.85);
    transition:
        opacity 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94),
        transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1),
        visibility 0.35s,
        box-shadow 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

#mac-back-to-top.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

#mac-back-to-top:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow:
        0 12px 32px rgba(0, 0, 0, 0.4),
        0 0 40px rgba(168, 85, 247, 0.55);
}

#mac-back-to-top:active {
    transform: translateY(-1px) scale(0.95);
    transition-duration: 0.1s;
}

#mac-back-to-top svg {
    pointer-events: none;
}

@media (max-width: 768px) {
    #mac-back-to-top {
        width: 44px;
        height: 44px;
        right: 0.85rem;
        bottom: 7.5rem;
    }
}

/* ============================================================
   PHASE 4 — STICKY MOBILE CTA BAR
   Fixed bottom bar visible only on mobile (<= 768px), appears
   after the user scrolls past the hero. Always-accessible
   conversion path without interfering with content.
   ============================================================ */
#mac-sticky-cta {
    display: none;
    /* hidden on desktop; the JS only injects it on mobile, but this is a safety net */
}

@media (max-width: 768px) {
    #mac-sticky-cta {
        display: block;
        position: fixed;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 9997;
        padding: 0.75rem 0.85rem calc(0.75rem + env(safe-area-inset-bottom));
        background: linear-gradient(180deg,
                rgba(8, 8, 16, 0.7) 0%,
                rgba(8, 8, 16, 0.95) 100%);
        backdrop-filter: blur(20px) saturate(160%);
        -webkit-backdrop-filter: blur(20px) saturate(160%);
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        opacity: 0;
        transform: translateY(100%);
        transition:
            opacity 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94),
            transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
        pointer-events: none;
    }

    #mac-sticky-cta.is-visible {
        opacity: 1;
        transform: translateY(0);
        pointer-events: auto;
    }

    #mac-sticky-cta .mac-sticky-cta__btn {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.625rem;
        width: 100%;
        min-height: 52px;
        padding: 0.85rem 1.25rem;
        background: linear-gradient(135deg, #d97706 0%, #f59e0b 50%, #fbbf24 100%);
        color: #1a1a1a;
        font-weight: 700;
        font-size: 1rem;
        letter-spacing: 0.02em;
        text-decoration: none;
        border-radius: 0.875rem;
        box-shadow:
            0 8px 24px rgba(245, 158, 11, 0.4),
            0 0 0 1px rgba(0, 0, 0, 0.1) inset;
        transition: transform 0.15s cubic-bezier(0.34, 1.56, 0.64, 1);
    }

    #mac-sticky-cta .mac-sticky-cta__btn:active {
        transform: scale(0.97);
    }

    #mac-sticky-cta .mac-sticky-cta__btn svg {
        flex-shrink: 0;
    }

    /* When sticky CTA is showing, lift the floating WhatsApp/Misti buttons
       and the back-to-top so they don't get hidden behind it. */
    #mac-sticky-cta.is-visible~* .floating-whatsapp-bottom,
    #mac-sticky-cta.is-visible~#mac-back-to-top {
        bottom: calc(7rem + env(safe-area-inset-bottom));
    }
}

/* ============================================================
   PHASE 4 — ACTIVE SECTION NAV INDICATOR
   Subtle dot below the active nav link as user scrolls.
   ============================================================ */
body.index-page .nav-menu a.is-current-section,
body.index-page .nav-link.is-current-section {
    color: #fff;
    position: relative;
}

body.index-page .nav-menu a.is-current-section::after,
body.index-page .nav-link.is-current-section::after {
    content: '';
    position: absolute;
    bottom: 0.4rem;
    left: 50%;
    width: 4px;
    height: 4px;
    background: linear-gradient(135deg, #a855f7, #4ecdc4);
    border-radius: 50%;
    transform: translateX(-50%);
    box-shadow: 0 0 8px rgba(168, 85, 247, 0.6);
}

/* ============================================================
   PHASE 4 — REDUCED MOTION GUARD
   ============================================================ */
@media (prefers-reduced-motion: reduce) {

    #mac-back-to-top,
    #mac-sticky-cta {
        transition: opacity 0.01ms !important;
        transform: none !important;
    }

    #mac-back-to-top.is-visible,
    #mac-sticky-cta.is-visible {
        transform: none !important;
    }
}

/* ============================================================
   MOBILE TOUCH POLISH — branded tap highlight
   ============================================================ */
@media (hover: none) and (pointer: coarse) {

    body.index-page .course-chip:hover {
        transform: none;
    }

    body.index-page .course-chip:active {
        transform: scale(0.96);
        transition-duration: 0.1s;
    }

    body.index-page .cta-button:hover::after {
        transform: translateX(-110%);
    }

    body.index-page a,
    body.index-page button {
        -webkit-tap-highlight-color: rgba(168, 85, 247, 0.18);
    }
}

/* ============================================================
   REDUCED MOTION — disable decorative motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {

    body.index-page .cta-button::after,
    body.index-page .hero-section::before,
    body.index-page .hero-section::after {
        display: none;
    }

    body.index-page .stat-item:hover,
    body.index-page .course-chip:hover {
        transform: none;
    }
}