/**
 * Landing Page Styles
 * tercih24 - Akıllı YKS Tercih Robotu
 * Converted from Tailwind to vanilla CSS
 */

/* =========================================================
   FONTS
   ========================================================= */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Space+Mono:wght@400;700&display=swap');

/* =========================================================
   DESIGN TOKENS
   ========================================================= */
:root {
    /* Typography */
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'Space Mono', monospace;

    /* Spacing */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-6: 24px;
    --space-8: 32px;
    --space-12: 48px;
    --space-16: 64px;
    --space-20: 80px;
    --space-32: 128px;

    /* Colors - Light Theme */
    --background: #E8EDF2;
    --background-soft: #F4F7FA;
    --background-elevated: #FFFFFF;
    --background-gradient:
    radial-gradient(1800px circle at 18% -28%, rgba(255, 255, 255, 0.11) 0%, rgba(255, 255, 255, 0) 74%),
    radial-gradient(1400px circle at 86% 3%, rgba(184, 197, 212, 0.07) 0%, rgba(184, 197, 212, 0) 76%),
        linear-gradient(160deg, #E8EDF2 0%, #E3EAF1 100%);
    --foreground: #1F2B36;
    --muted: #DDE5ED;
    --muted-foreground: #5B6978;
    --border: #B6C1CC;
    --border-soft: rgba(130, 145, 160, 0.28);
    --accent: #72879D;
    --primary: #5D7287;
    --primary-foreground: #F8FAFC;
    --cta-gradient: linear-gradient(145deg, #6E8398 0%, #4D6278 100%);

    /* Glass system */
    --glass-bg: rgba(239, 246, 252, 0.56);
    --glass-bg-soft: rgba(235, 242, 249, 0.46);
    --glass-bg-strong: rgba(246, 250, 255, 0.72);
    --glass-border: rgba(255, 255, 255, 0.72);
    --glass-border-strong: rgba(142, 156, 172, 0.38);
    --glass-shadow: 0 20px 42px rgba(31, 45, 63, 0.16);
    --glass-shadow-soft: 0 12px 24px rgba(31, 45, 63, 0.11);
    --glass-inner-highlight: inset 0 1px 0 rgba(255, 255, 255, 0.8), inset 0 -1px 0 rgba(146, 161, 178, 0.2);
    --glass-blur: 22px;
    --glass-saturate: 118%;
    --liquid-overlay: linear-gradient(146deg, rgba(255, 255, 255, 0.58) 0%, rgba(255, 255, 255, 0.22) 45%, rgba(186, 201, 217, 0.34) 100%);
    --liquid-specular: radial-gradient(132% 108% at 0% 0%, rgba(255, 255, 255, 0.72) 0%, rgba(255, 255, 255, 0) 56%);
    --liquid-opacity: 0.72;
    --ring: rgba(104, 124, 147, 0.44);

    /* Container */
    --container-max: 1200px;
    --container-padding: 24px;
}

html.dark {
    --background: #0E1319;
    --background-soft: #151D25;
    --background-elevated: #1C2630;
    --background-gradient:
        radial-gradient(1700px circle at 12% -26%, rgba(129, 145, 162, 0.11) 0%, rgba(129, 145, 162, 0) 82%),
        radial-gradient(1300px circle at 86% 2%, rgba(63, 79, 95, 0.17) 0%, rgba(63, 79, 95, 0) 78%),
        linear-gradient(160deg, #0E1319 0%, #111923 100%);
    --foreground: #D8E0E7;
    --muted: #1C2530;
    --muted-foreground: #93A2B0;
    --border: #324151;
    --border-soft: rgba(175, 191, 208, 0.2);
    --accent: #9DAFC1;
    --primary: #8FA3B7;
    --primary-foreground: #0E1319;
    --cta-gradient: linear-gradient(145deg, #8EA2B6 0%, #62778D 100%);

    /* Glass system */
    --glass-bg: rgba(19, 27, 35, 0.58);
    --glass-bg-soft: rgba(19, 27, 35, 0.44);
    --glass-bg-strong: rgba(22, 31, 40, 0.74);
    --glass-border: rgba(220, 232, 244, 0.14);
    --glass-border-strong: rgba(220, 232, 244, 0.24);
    --glass-shadow: 0 26px 56px rgba(2, 6, 14, 0.52);
    --glass-shadow-soft: 0 14px 30px rgba(2, 6, 14, 0.38);
    --glass-inner-highlight: inset 0 1px 0 rgba(255, 255, 255, 0.15);
    --glass-blur: 20px;
    --glass-saturate: 112%;
    --liquid-overlay: linear-gradient(150deg, rgba(255, 255, 255, 0.14) 0%, rgba(255, 255, 255, 0.03) 56%, rgba(255, 255, 255, 0.08) 100%);
    --liquid-specular: radial-gradient(135% 115% at 0% 0%, rgba(255, 255, 255, 0.12) 0%, rgba(255, 255, 255, 0) 56%);
    --liquid-opacity: 0.9;
    --ring: rgba(153, 173, 194, 0.52);
}

@media (min-width: 768px) {
    :root {
        --container-padding: 48px;
    }
}

@media (min-width: 1024px) {
    :root {
        --container-padding: 80px;
    }
}

/* =========================================================
   BASE STYLES
   ========================================================= */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body.landing {
    font-family: var(--font-sans);
    background: var(--background-gradient);
    background-color: var(--background);
    background-attachment: scroll;
    color: var(--foreground);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* =========================================================
   GLASS SURFACE PRIMITIVES
   ========================================================= */
.landing-methodology__card,
.landing-sample__panel,
.landing-sample__code,
.landing-features__card,
.landing-data__inner,
.landing-data__stat,
.landing-formula,
.landing-cta__inner,
.landing-page__content {
    position: relative;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border-strong);
    box-shadow: var(--glass-shadow-soft), var(--glass-inner-highlight);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    overflow: hidden;
}

.landing-methodology__card::before,
.landing-sample__panel::before,
.landing-sample__code::before,
.landing-features__card::before,
.landing-data__inner::before,
.landing-data__stat::before,
.landing-formula::before,
.landing-cta__inner::before,
.landing-page__content::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--liquid-specular), var(--liquid-overlay);
    pointer-events: none;
    opacity: var(--liquid-opacity);
}

.landing-methodology__card > *,
.landing-sample__panel > *,
.landing-sample__code > *,
.landing-features__card > *,
.landing-data__inner > *,
.landing-data__stat > *,
.landing-formula > *,
.landing-cta__inner > *,
.landing-page__content > * {
    position: relative;
    z-index: 1;
}

/* Keep sheen stable on scrollable areas: avoid fixed overlay artifact while inner content scrolls */
.landing-sample__code::before {
    content: none;
}

/* =========================================================
   CONTAINER
   ========================================================= */
.landing-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    width: 100%;
}

/* =========================================================
   HEADER
   ========================================================= */
.landing-header {
    padding: 1px var(--container-padding);
    position: sticky;
    top: 0;
    z-index: 40;
    background: linear-gradient(130deg,
            color-mix(in oklab, var(--glass-bg) 23%, transparent) 0%,
            color-mix(in oklab, var(--glass-bg) 42%, transparent) 48%,
            color-mix(in oklab, var(--glass-bg-strong) 36%, transparent) 100%);
    border-bottom: 1px solid var(--glass-border-strong);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    overflow: hidden;
    isolation: isolate;
}

.landing-header::before {
    content: '';
    position: relative;
    inset: 0;
    background: var(--liquid-specular), var(--liquid-overlay);
    opacity: 0.6;
    pointer-events: none;
    z-index: 0;
}

.landing-header__inner {
    max-width: var(--container-max);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 18px;
    border-radius: 0;
    background: transparent;
    border: 0;
    box-shadow: none;
    position: relative;
    z-index: 1;
}

.landing-header__logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    text-decoration: none;
    color: inherit;
}

.landing-header__logo-img {
    height: 24px;
    width: auto;
}

/* Light mode: show dark logo, hide light logo */
.landing-header__logo-img--light {
    display: block;
}

.landing-header__logo-img--dark {
    display: none;
}

/* Dark mode: show light logo, hide dark logo */
html.dark .landing-header__logo-img--light {
    display: none;
}

html.dark .landing-header__logo-img--dark {
    display: block;
}

.landing-header__logo-dot {
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
}

.landing-header__logo-text {
    font-weight: 500;
    letter-spacing: -0.02em;
}

.landing-header__nav {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.landing-header__link {
    font-size: 0.875rem;
    color: var(--muted-foreground);
    text-decoration: none;
    transition: color 0.2s ease, background-color 0.2s ease;
    border-radius: 999px;
    padding: 5px 10px;
}

.landing-header__link:hover {
    color: var(--foreground);
    background: color-mix(in oklab, var(--glass-bg-strong) 78%, transparent);
}

.landing-header__link--arrow {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--foreground);
    transition: gap 0.2s ease;
}

.landing-header__link--arrow:hover {
    gap: 10px;
}

.landing-header__link--arrow svg {
    width: 14px;
    height: 14px;
}

[data-theme-toggle] {
    background: var(--glass-bg-strong) !important;
    border: 1px solid var(--glass-border-strong) !important;
    color: var(--foreground);
    border-radius: 999px;
    padding: 5px 10px !important;
    box-shadow: var(--glass-shadow-soft), var(--glass-inner-highlight);
    backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
}

[data-theme-toggle]:hover {
    background: var(--glass-bg) !important;
}

/* Mobile menu toggle */
.landing-header__menu-toggle {
    display: none;
}

@media (max-width: 768px) {
    .landing-header__nav {
        display: none;
    }

    .landing-header__menu-toggle {
        display: flex;
    }
}

/* =========================================================
   HERO SECTION
   ========================================================= */
.landing-hero {
    padding: var(--space-12) var(--container-padding) var(--space-20);
}

.landing-hero__inner {
    max-width: var(--container-max);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-16);
    align-items: center;
    padding: 0;
}

@media (min-width: 1024px) {
    .landing-hero__inner {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-16);
    }
}

/* Hero Brand (Large Centered Logo) */
.landing-hero__brand {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-8);
}

.landing-hero__brand-link {
    display: block;
}

.landing-hero__brand-img {
    height: 40px;
    width: auto;
}

@media (min-width: 768px) {
    .landing-hero__brand-img {
        height: 50px;
    }
}

/* Light mode: show dark logo */
.landing-hero__brand-img--light {
    display: block;
}

.landing-hero__brand-img--dark {
    display: none;
}

/* Dark mode: show light logo */
html.dark .landing-hero__brand-img--light {
    display: none;
}

html.dark .landing-hero__brand-img--dark {
    display: block;
}

.landing-hero__brand-tagline {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--muted-foreground);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}


.landing-hero__content {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
    padding: 0;
    background: transparent;
    border: 0;
    box-shadow: none;
}

.landing-hero__eyebrow {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--muted-foreground);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.landing-hero__title {
    font-size: clamp(2.5rem, 5vw, 3.75rem);
    font-weight: 300;
    letter-spacing: -0.025em;
    line-height: 1.1;
}

.landing-hero__subtitle {
    font-size: 1.125rem;
    color: var(--muted-foreground);
    max-width: 400px;
}

.landing-hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.landing-hero__btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.15s ease;
}

.landing-hero__btn--primary {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    background: linear-gradient(180deg,
            color-mix(in oklab, var(--primary) 52%, #e8f1f9 48%) 0%,
            color-mix(in oklab, var(--primary) 70%, #7f94aa 30%) 100%);
    color: var(--primary-foreground);
    border-radius: 999px;
    border: 1px solid color-mix(in oklab, var(--glass-border-strong) 58%, var(--primary) 42%);
    box-shadow: 0 14px 30px rgba(20, 31, 46, 0.22), inset 0 1px 0 rgba(255, 255, 255, 0.28);
    transition: transform 0.24s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.24s ease, filter 0.24s ease;
}

.landing-hero__btn--primary:hover {
    transform: translateY(-2px);
    filter: saturate(1.08);
    box-shadow: 0 18px 34px rgba(20, 31, 46, 0.26), inset 0 1px 0 rgba(255, 255, 255, 0.34);
}

.landing-hero__btn--primary:active {
    transform: translateY(0) scale(0.985);
    box-shadow: 0 10px 20px rgba(20, 31, 46, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.24);
}

.landing-hero__btn--primary:focus-visible {
    outline: 2px solid color-mix(in oklab, var(--ring) 72%, transparent);
    outline-offset: 2px;
}

.landing-hero__btn--primary::before {
    content: '';
    position: absolute;
    inset: 1px;
    border-radius: inherit;
    background: radial-gradient(120% 90% at 50% 0%, rgba(255, 255, 255, 0.42) 0%, rgba(255, 255, 255, 0.1) 62%, rgba(255, 255, 255, 0) 100%);
    pointer-events: none;
    z-index: 0;
}

.landing-hero__btn--primary::after {
    content: none;
}

.landing-hero__btn--primary:hover::after {
    content: none;
}

.landing-hero__btn--primary > * {
    position: relative;
    z-index: 1;
}

.landing-hero__btn--primary svg,
.landing-cta__btn svg {
    transition: transform 0.24s ease;
}

.landing-hero__btn--primary:hover svg,
.landing-cta__btn:hover svg {
    transform: translateX(2px);
}

.landing-hero__btn--secondary {
    background: var(--glass-bg-soft);
    color: var(--foreground);
    border: 1px solid var(--glass-border-strong);
    border-radius: 999px;
    box-shadow: var(--glass-shadow-soft), var(--glass-inner-highlight);
}

.landing-hero__btn--secondary:hover {
    border-color: var(--foreground);
}

.landing-hero__btn svg {
    width: 16px;
    height: 16px;
}

/* Stats */




/* Visualization */
.landing-hero__viz {
    position: relative;
    padding: 0;
    border-radius: 0;
    background: transparent;
    border: 0;
    box-shadow: none;
}

@media (min-width: 1024px) {
    .landing-hero__viz {
        padding: 0;
    }
}

.landing-hero__canvas-wrap {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    max-width: 500px;
    margin: 0 auto;
    padding: 0;
    border-radius: 24px;
    background: transparent;
    border: 1px solid var(--glass-border);
}

#clustering-canvas {
    width: 100%;
    height: 100%;
    display: block;
    background: transparent;
}

/* Axis labels */
.landing-hero__axis-label {
    position: absolute;
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--muted-foreground);
}

.landing-hero__axis-label--top {
    top: 0;
    left: -24px;
}

.landing-hero__axis-label--bottom-left {
    bottom: -20px;
    left: 0;
}

.landing-hero__axis-label--bottom-right {
    bottom: -20px;
    right: 0;
}

.landing-hero__axis-label--x {
    bottom: -32px;
    left: 50%;
    transform: translateX(-50%);
    letter-spacing: 0.1em;
}

.landing-hero__axis-label--y {
    left: -40px;
    top: 50%;
    transform: translateY(-50%) rotate(-90deg);
    letter-spacing: 0.1em;
}

/* Legend */
.landing-hero__legend {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-6);
    margin-top: var(--space-8);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--muted-foreground);
}

.landing-hero__legend-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.landing-hero__legend-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--foreground);
    opacity: 0.6;
}

.landing-hero__legend-circle {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 1px solid var(--accent);
}

/* =========================================================
   METHODOLOGY SECTION
   ========================================================= */
.landing-methodology {
    padding: var(--space-32) var(--container-padding);
    border-top: 1px solid var(--border-soft);
}

.landing-methodology__inner {
    max-width: var(--container-max);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-16);
}

@media (min-width: 1024px) {
    .landing-methodology__inner {
        grid-template-columns: 4fr 8fr;
    }
}

.landing-methodology__header {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.landing-methodology__eyebrow {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--muted-foreground);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.landing-methodology__title {
    font-size: clamp(1.875rem, 4vw, 2.5rem);
    font-weight: 300;
    letter-spacing: -0.025em;
    line-height: 1.2;
}

.landing-methodology__grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: var(--space-8);
}

@media (min-width: 768px) {
    .landing-methodology__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.landing-methodology__card {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    padding: var(--space-8);
    border-radius: 24px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border-strong);
    box-shadow: var(--glass-shadow-soft), var(--glass-inner-highlight);
}

.landing-methodology__number {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--muted-foreground);
}

.landing-methodology__card-title {
    font-size: 1.125rem;
    font-weight: 500;
}

.landing-methodology__card-text {
    color: var(--muted-foreground);
    line-height: 1.7;
}

/* =========================================================
   SAMPLE OUTPUT SECTION
   ========================================================= */
.landing-sample {
    padding: var(--space-32) var(--container-padding);
    border-top: 1px solid var(--border-soft);
}

.landing-sample__inner {
    max-width: var(--container-max);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-16);
}

.landing-sample__panel {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-12);
    padding: var(--space-12);
    background: var(--glass-bg-strong);
    border: 1px solid var(--glass-border-strong);
    border-radius: 30px;
    box-shadow: var(--glass-shadow), var(--glass-inner-highlight);
}

@media (min-width: 1024px) {
    .landing-sample__panel {
        grid-template-columns: 4fr 8fr;
        align-items: start;
    }
}

.landing-sample__summary {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.landing-sample__eyebrow {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--muted-foreground);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.landing-sample__title {
    font-size: clamp(1.875rem, 4vw, 2.5rem);
    font-weight: 300;
    letter-spacing: -0.025em;
    line-height: 1.2;
}

.landing-sample__text {
    color: var(--muted-foreground);
    line-height: 1.7;
}

.landing-sample__meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
}

.landing-sample__pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 4px 10px;
    border-radius: 999px;
    border: 1px solid var(--glass-border-strong);
    background: var(--glass-bg-soft);
    color: var(--muted-foreground);
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

.landing-sample__content {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.landing-sample__code {
    background:
        var(--liquid-specular),
        var(--liquid-overlay),
        var(--glass-bg-soft);
    background-attachment: local, local, local;
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    overflow-x: auto;
    overflow-y: auto;
    max-height: 360px;
    scrollbar-gutter: stable;
    box-shadow: var(--glass-shadow-soft), var(--glass-inner-highlight);
}

.landing-sample__code-row {
    display: grid;
    grid-template-columns: 40px 1.2fr 1.6fr 0.7fr;
    gap: var(--space-4);
    padding: var(--space-3) var(--space-4);
    min-width: 600px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

.landing-sample__code-row + .landing-sample__code-row {
    border-top: 1px solid var(--glass-border-strong);
}

.landing-sample__code-index {
    color: var(--muted-foreground);
}

.landing-sample__note {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--muted-foreground);
}

/* =========================================================
   DATA SECTION (Dark Inverted)
   ========================================================= */
.landing-data {
    padding: var(--space-32) var(--container-padding);
    border-top: 1px solid var(--border-soft);
    color: var(--foreground);
}

.landing-data__inner {
    max-width: var(--container-max);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-16);
    padding: clamp(22px, 3vw, 38px);
    border-radius: 32px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border-strong);
    box-shadow: var(--glass-shadow), var(--glass-inner-highlight);
}

@media (min-width: 1024px) {
    .landing-data__inner {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-16);
    }
}

.landing-data__content {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

.landing-data__eyebrow {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    opacity: 0.62;
}

.landing-data__title {
    font-size: clamp(1.875rem, 4vw, 2.5rem);
    font-weight: 300;
    letter-spacing: -0.025em;
    line-height: 1.2;
}

.landing-data__text {
    opacity: 0.84;
    line-height: 1.7;
}

.landing-data__stats {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

.landing-data__stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-8);
}

.landing-data__stat {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    padding: var(--space-6);
    border-radius: 18px;
    background: var(--glass-bg-soft);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow-soft), var(--glass-inner-highlight);
}

.landing-data__stat-value {
    font-family: var(--font-mono);
    font-size: clamp(2.5rem, 5vw, 3rem);
    font-weight: 300;
}

.landing-data__stat-label {
    font-size: 0.875rem;
    opacity: 0.72;
}

.landing-data__footnote {
    padding-top: var(--space-8);
    border-top: 1px solid var(--glass-border-strong);
    opacity: 0.95;
}

.landing-data__footnote-text {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    opacity: 0.8;
    line-height: 1.6;
}

/* =========================================================
   FEATURES SECTION
   ========================================================= */
.landing-features {
    padding: var(--space-32) var(--container-padding);
    border-top: 1px solid var(--border-soft);
}

.landing-features__inner {
    max-width: var(--container-max);
    margin: 0 auto;
}

.landing-features__header {
    text-align: center;
    margin-bottom: var(--space-20);
}

.landing-features__eyebrow {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--muted-foreground);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: var(--space-4);
}

.landing-features__title {
    font-size: clamp(1.875rem, 4vw, 2.5rem);
    font-weight: 300;
    letter-spacing: -0.025em;
}



.landing-features__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
    background: transparent;
}

@media (min-width: 768px) {
    .landing-features__grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.landing-features__card {
    background: var(--glass-bg-strong);
    padding: var(--space-4) var(--space-20);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    align-items: center;
    text-align: center;
    border-radius: 24px;
    border: 1px solid var(--glass-border-strong);
    box-shadow: var(--glass-shadow-soft), var(--glass-inner-highlight);
}

.landing-features__letter {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--muted-foreground);
}

.landing-features__card-title {
    font-size: 1.225rem;
    font-weight: 500;
}

.landing-features__card-text {
    font-size: 0.875rem;
    /*color: var(--muted-foreground);*/
    line-height: 1.7;
}

/* Formula Section */
/* Formula Section */
.landing-formula-section {
    padding: 200px var(--container-padding);
    border-top: 1px solid var(--border-soft);
}

@media (min-width: 1024px) {
    .landing-formula-section {
        padding: 250px var(--container-padding);
    }
}

.landing-formula-section .landing-container {
    max-width: var(--container-max);
    margin: 0 auto;
    width: 100%;
    padding: 0;
}

.landing-formula {
    margin-top: 0;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-8);
    padding: clamp(28px, 4vw, 52px);
    border-radius: 30px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border-strong);
    box-shadow: var(--glass-shadow), var(--glass-inner-highlight);
}

.landing-formula__eyebrow {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--muted-foreground);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.landing-formula__math {
    font-family: 'Times New Roman', Times, serif;
    font-size: clamp(1.25rem, 4vw, 2rem);
    letter-spacing: 0.02em;
    line-height: 1.4;
    padding: 0 var(--space-4);
}

.landing-formula__text {
    font-size: 0.875rem;
    color: var(--muted-foreground);
    max-width: 600px;
    line-height: 1.7;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
}

.landing-formula__pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg-soft);
    color: var(--muted-foreground);
    border-radius: 99px;
    padding: 2px 8px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    height: 20px;
}


/* =========================================================
   CTA SECTION
   ========================================================= */
.landing-cta {
    padding: var(--space-32) var(--container-padding);
    border-top: 1px solid var(--border-soft);
}

.landing-cta__inner {
    max-width: var(--container-max);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-8);
    padding: clamp(28px, 4vw, 52px);
    border-radius: 34px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border-strong);
    box-shadow: var(--glass-shadow), var(--glass-inner-highlight);
}

.landing-cta__title {
    font-size: clamp(2.5rem, 5vw, 3.75rem);
    font-weight: 300;
    letter-spacing: -0.025em;
    line-height: 1.1;
}

.landing-cta__text {
    font-size: 1.125rem;
    color: var(--muted-foreground);
    max-width: 400px;
}

.landing-cta__btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-8);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    position: relative;
    isolation: isolate;
    overflow: hidden;
    background: linear-gradient(180deg,
            color-mix(in oklab, var(--primary) 52%, #e8f1f9 48%) 0%,
            color-mix(in oklab, var(--primary) 70%, #7f94aa 30%) 100%);
    color: var(--primary-foreground);
    border-radius: 999px;
    border: 1px solid color-mix(in oklab, var(--glass-border-strong) 58%, var(--primary) 42%);
    box-shadow: 0 14px 30px rgba(20, 31, 46, 0.22), inset 0 1px 0 rgba(255, 255, 255, 0.28);
    cursor: pointer;
    transition: transform 0.24s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.24s ease, filter 0.24s ease;
    margin-top: var(--space-4);
}

.landing-cta__btn:hover {
    transform: translateY(-2px);
    filter: saturate(1.08);
    box-shadow: 0 18px 34px rgba(20, 31, 46, 0.26), inset 0 1px 0 rgba(255, 255, 255, 0.34);
}

.landing-cta__btn:active {
    transform: translateY(0) scale(0.985);
    box-shadow: 0 10px 20px rgba(20, 31, 46, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.24);
}

.landing-cta__btn:focus-visible {
    outline: 2px solid color-mix(in oklab, var(--ring) 72%, transparent);
    outline-offset: 2px;
}

.landing-cta__btn::before {
    content: '';
    position: absolute;
    inset: 1px;
    border-radius: inherit;
    background: radial-gradient(120% 90% at 50% 0%, rgba(255, 255, 255, 0.42) 0%, rgba(255, 255, 255, 0.1) 62%, rgba(255, 255, 255, 0) 100%);
    pointer-events: none;
    z-index: 0;
}

.landing-cta__btn::after {
    content: none;
}

.landing-cta__btn:hover::after {
    content: none;
}

.landing-cta__btn > * {
    position: relative;
    z-index: 1;
}

.landing-cta__btn svg {
    width: 16px;
    height: 16px;
}

.landing-cta__note {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--muted-foreground);
    margin-top: var(--space-8);
}

/* =========================================================
   SIMPLE PAGE (ABOUT)
   ========================================================= */
.landing-page-hero {
    padding: var(--space-20) var(--container-padding) var(--space-12);
    border-bottom: 1px solid var(--border-soft);
}

.landing-page-hero__inner {
    max-width: var(--container-max);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.landing-page__eyebrow {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--muted-foreground);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.landing-page__title {
    font-size: clamp(2.25rem, 5vw, 3.25rem);
    font-weight: 300;
    letter-spacing: -0.025em;
    line-height: 1.1;
}

.landing-page__lead {
    font-size: 1.125rem;
    color: var(--muted-foreground);
    max-width: 640px;
}

.landing-page {
    padding: var(--space-12) var(--container-padding) var(--space-32);
}

.landing-page__content {
    max-width: 820px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    color: var(--muted-foreground);
    line-height: 1.7;
    padding: clamp(22px, 3vw, 36px);
    border-radius: 24px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border-strong);
    box-shadow: var(--glass-shadow-soft), var(--glass-inner-highlight);
}

.landing-page__content strong {
    color: var(--foreground);
    font-weight: 600;
}

.landing-page__content a {
    color: inherit;
    text-decoration: none;
    border-bottom: 1px solid var(--border);
}

.landing-page__content a:hover {
    border-color: var(--foreground);
}

/* =========================================================
   FOOTER
   ========================================================= */
.landing-footer {
    padding: var(--space-8) var(--container-padding);
    border-top: 1px solid var(--border-soft);
}

.landing-footer__inner {
    max-width: var(--container-max);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
}

@media (min-width: 768px) {
    .landing-footer__inner {
        flex-direction: row;
    }
}

.landing-footer__links {
    display: flex;
    align-items: center;
    gap: var(--space-6);
    font-size: 0.75rem;
    color: var(--muted-foreground);
}

.landing-footer__link {
    color: inherit;
    text-decoration: none;
    transition: color 0.15s ease;
}

.landing-footer__link:hover {
    color: var(--foreground);
}

.landing-footer__formula {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--muted-foreground);
    opacity: 0.5;
    letter-spacing: 0.05em;
}

/* =========================================================
   UTILITIES
   ========================================================= */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}