/* ============================================================
   Winnow Public — marketing site styles
   Mobile-first. No framework. CSS custom properties throughout.
   ============================================================ */

/* ---- Variables ---- */
:root {
    /* Colors */
    --color-bg:            #ffffff;
    --color-surface:       #f5f5f5;
    --color-surface-alt:   #eeeeee;
    --color-primary:       #1a1a1a;
    --color-primary-hover: #333333;
    --color-accent:        #2563eb;
    --color-accent-hover:  #1d4ed8;
    --color-text:          #1a1a1a;
    --color-text-muted:    #6b7280;
    --color-border:        #e5e7eb;
    --color-hero-bg:       #f9fafb;
    --color-dark-section:  #1a1a2e;
    --color-dark-text:     #ffffff;
    --color-badge:         rgba(255,255,255,.15);

    /* Feature icon color */
    --color-icon:          #2563eb;

    /* Typography */
    --font-sans:        system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    --font-size-base:   1rem;       /* 16px */
    --font-size-sm:     0.875rem;
    --font-size-xs:     0.75rem;
    --font-size-lg:     1.125rem;
    --font-size-xl:     1.375rem;
    --font-size-2xl:    1.75rem;
    --font-size-3xl:    2.25rem;
    --font-size-4xl:    3rem;
    --line-height:      1.6;

    /* Spacing */
    --space-1:  0.25rem;
    --space-2:  0.5rem;
    --space-3:  0.75rem;
    --space-4:  1rem;
    --space-6:  1.5rem;
    --space-8:  2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    /* Layout */
    --max-width:      1100px;
    --header-height:  64px;
    --radius:         8px;
    --radius-lg:      16px;
    --radius-full:    9999px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,.10);
    --shadow-lg: 0 8px 24px rgba(0,0,0,.12);
}

/* ---- Reset ---- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* ---- Base ---- */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: var(--line-height);
}

a {
    color: inherit;
    text-decoration: none;
}

img, svg {
    display: block;
}

/* ---- Inner wrapper ---- */
.section-inner {
    max-width: var(--max-width);
    margin-inline: auto;
    padding-inline: var(--space-6);
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-2) var(--space-6);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--radius-full);
    border: 2px solid transparent;
    cursor: pointer;
    white-space: nowrap;
    transition: background-color .15s, color .15s, border-color .15s, box-shadow .15s;
    text-decoration: none;
}

.btn-lg {
    padding: var(--space-3) var(--space-8);
    font-size: var(--font-size-base);
}

/* Filled dark — hero CTA */
.btn-dark {
    background: var(--color-primary);
    color: #ffffff;
    border-color: var(--color-primary);
}
.btn-dark:hover {
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
}

/* Filled primary — header Sign Up */
.btn-primary {
    background: var(--color-accent);
    color: #ffffff;
    border-color: var(--color-accent);
}
.btn-primary:hover {
    background: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
}

/* Ghost — header Sign In */
.btn-ghost {
    background: transparent;
    color: var(--color-text);
    border-color: var(--color-border);
}
.btn-ghost:hover {
    border-color: var(--color-primary);
}

/* Outline on dark background */
.btn-outline-light {
    background: transparent;
    color: var(--color-dark-text);
    border-color: rgba(255,255,255,.6);
}
.btn-outline-light:hover {
    background: rgba(255,255,255,.1);
    border-color: #ffffff;
}

/* Outline on light background */
.btn-outline {
    background: transparent;
    color: var(--color-text);
    border-color: var(--color-primary);
}
.btn-outline:hover {
    background: var(--color-primary);
    color: #ffffff;
}

/* ============================================================
   Header
   ============================================================ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 200;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    height: var(--header-height);
}

.header-inner {
    max-width: var(--max-width);
    margin-inline: auto;
    padding-inline: var(--space-6);
    height: 100%;
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.site-logo {
    font-size: var(--font-size-xl);
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--color-text);
    flex-shrink: 0;
}

.site-nav {
    display: flex;
    gap: var(--space-6);
    flex: 1;
}

.nav-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-muted);
    transition: color .15s;
}

.nav-link:hover {
    color: var(--color-text);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-left: auto;
}

/* Hamburger — hidden on desktop */
.nav-toggle-checkbox {
    display: none;
}
.nav-toggle-label {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: var(--space-2);
    margin-left: auto;
}
.nav-toggle-label span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: transform .2s, opacity .2s;
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
    background: var(--color-hero-bg);
    padding-block: var(--space-24);
    text-align: center;
}

.hero-inner {
    max-width: 720px;
    margin-inline: auto;
    padding-inline: var(--space-6);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-6);
}

.hero-eyebrow {
    font-size: var(--font-size-sm);
    font-weight: 600;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--color-accent);
}

.hero-headline {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: var(--color-text);
}

.hero-sub {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
    max-width: 560px;
    line-height: 1.65;
}

/* ============================================================
   Talent intro
   ============================================================ */
.talent-intro {
    padding-block: var(--space-12);
    text-align: center;
    border-bottom: 1px solid var(--color-border);
}

.talent-intro h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text-muted);
}

/* ============================================================
   Features
   ============================================================ */
.features {
    padding-block: var(--space-20);
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-8);
    margin-top: var(--space-2);
}

.feature-card {
    padding: var(--space-8);
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.feature-icon {
    width: 48px;
    height: 48px;
    color: var(--color-icon);
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
}

.feature-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* ============================================================
   Become a winner
   ============================================================ */
.become-winner {
    padding-block: var(--space-20);
    background: var(--color-surface);
}

.become-winner-inner {
    display: flex;
    gap: var(--space-16);
    align-items: flex-start;
}

.become-winner-text {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.become-winner-text h2 {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-2);
}

.become-winner-text p {
    color: var(--color-text-muted);
    line-height: 1.7;
}

.become-winner-visual {
    flex-shrink: 0;
    width: 280px;
}

.placeholder-image {
    width: 100%;
    aspect-ratio: 4 / 3;
    background: var(--color-surface-alt);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
}

.placeholder-image svg {
    width: 80px;
    height: 80px;
    opacity: .4;
}

/* ============================================================
   Vote & root
   ============================================================ */
.vote-root {
    background: var(--color-dark-section);
    color: var(--color-dark-text);
    padding-block: var(--space-24);
}

.vote-root-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-6);
    text-align: center;
}

.vote-root-badge,
.watch-content-badge {
    display: inline-block;
    padding: var(--space-1) var(--space-4);
    background: var(--color-badge);
    border: 1px solid rgba(255,255,255,.2);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    letter-spacing: .06em;
    text-transform: uppercase;
}

.vote-root-inner h2 {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.15;
}

.vote-root-inner p {
    font-size: var(--font-size-base);
    color: rgba(255,255,255,.75);
    max-width: 560px;
    line-height: 1.7;
}

/* ============================================================
   Watch content
   ============================================================ */
.watch-content {
    background: var(--color-surface);
    padding-block: var(--space-24);
}

.watch-content-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-6);
    text-align: center;
}

.watch-content-inner h2 {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.15;
}

.watch-content-inner p {
    font-size: var(--font-size-base);
    color: var(--color-text-muted);
    max-width: 560px;
    line-height: 1.7;
}

/* ============================================================
   FAQ
   ============================================================ */
.faq-section {
    padding-block: var(--space-20);
}

.faq-heading {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-8);
}

.faq-list {
    display: flex;
    flex-direction: column;
    border-top: 1px solid var(--color-border);
}

.faq-item {
    border-bottom: 1px solid var(--color-border);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-4);
    padding-block: var(--space-5);
    cursor: pointer;
    font-size: var(--font-size-base);
    font-weight: 600;
    list-style: none;
    user-select: none;
}

/* Remove default marker in Safari */
.faq-question::-webkit-details-marker {
    display: none;
}

.faq-chevron {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    color: var(--color-text-muted);
    transition: transform .2s;
}

.faq-chevron svg {
    width: 100%;
    height: 100%;
}

.faq-item[open] .faq-chevron {
    transform: rotate(180deg);
}

.faq-answer {
    padding-bottom: var(--space-6);
    color: var(--color-text-muted);
    line-height: 1.7;
    font-size: var(--font-size-sm);
}

/* ============================================================
   Still have questions
   ============================================================ */
.still-questions {
    background: var(--color-surface);
    padding-block: var(--space-16);
    text-align: center;
}

.still-questions .section-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
}

.still-questions h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
}

.still-questions p {
    color: var(--color-text-muted);
    max-width: 420px;
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
    background: var(--color-primary);
    color: rgba(255,255,255,.75);
    padding-block: var(--space-10);
}

.footer-inner {
    max-width: var(--max-width);
    margin-inline: auto;
    padding-inline: var(--space-6);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
    text-align: center;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-6);
    justify-content: center;
}

.footer-link {
    font-size: var(--font-size-sm);
    color: rgba(255,255,255,.7);
    transition: color .15s;
}

.footer-link:hover {
    color: #ffffff;
}

.footer-copy {
    font-size: var(--font-size-xs);
    color: rgba(255,255,255,.45);
}

/* ============================================================
   Responsive — tablet (≥ 640px)
   ============================================================ */
@media (min-width: 640px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ============================================================
   Responsive — desktop (≥ 768px)
   ============================================================ */
@media (min-width: 768px) {
    .features-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .become-winner-inner {
        flex-direction: row;
    }

    .hero-headline {
        font-size: var(--font-size-4xl);
    }
}

/* ============================================================
   Responsive — mobile (< 768px)
   ============================================================ */
@media (max-width: 767px) {

    /* Header: show hamburger, hide inline nav and action buttons initially */
    .nav-toggle-label {
        display: flex;
    }

    .site-nav,
    .header-actions {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--color-bg);
        border-bottom: 1px solid var(--color-border);
        padding: var(--space-4) var(--space-6);
        z-index: 199;
        box-shadow: var(--shadow-md);
    }

    .site-nav {
        flex-direction: column;
        gap: var(--space-3);
    }

    .header-actions {
        flex-direction: column;
        align-items: stretch;
        top: calc(var(--header-height) + 120px);
        gap: var(--space-3);
    }

    .nav-toggle-checkbox:checked ~ .site-nav,
    .nav-toggle-checkbox:checked ~ .header-actions {
        display: flex;
    }

    /* Animate hamburger to X */
    .nav-toggle-checkbox:checked + .nav-toggle-label span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }
    .nav-toggle-checkbox:checked + .nav-toggle-label span:nth-child(2) {
        opacity: 0;
    }
    .nav-toggle-checkbox:checked + .nav-toggle-label span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    /* Hero */
    .hero {
        padding-block: var(--space-16);
    }

    .hero-headline {
        font-size: var(--font-size-3xl);
    }

    .hero-sub {
        font-size: var(--font-size-base);
    }

    /* Become a winner: stack */
    .become-winner-inner {
        flex-direction: column;
    }

    .become-winner-visual {
        width: 100%;
    }

    .become-winner-text h2 {
        font-size: var(--font-size-2xl);
    }

    /* Vote & Watch headings */
    .vote-root-inner h2,
    .watch-content-inner h2 {
        font-size: var(--font-size-2xl);
    }

    .faq-heading {
        font-size: var(--font-size-2xl);
    }
}

/* ============================================================
   Responsive — small mobile (< 480px)
   ============================================================ */
@media (max-width: 479px) {
    .hero-headline {
        font-size: var(--font-size-2xl);
    }

    .section-inner {
        padding-inline: var(--space-4);
    }
}