/*
  Parle landing page styles
  Palette derived from mobile_frontend/lib/data/constants.dart
*/

:root {
    --color-primary-sky-blue: #0499ed;
    --color-primary-dark: #0288d1;
    --color-primary-light: #b3e5fc;
    --color-secondary-orange: #ff932d;
    --color-secondary-dark: #f57c00;
    --color-neutral-dark: #212121;
    --color-neutral-mid: #757575;
    --color-neutral-light: #f5f5f5;
    --color-white: #ffffff;
    --font-sans: "Inter", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    --max-width: 1120px;
    --section-padding: 6rem;
    --transition-fast: 150ms ease-in-out;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: var(--font-sans);
    color: var(--color-neutral-dark);
    background-color: var(--color-white);
    line-height: 1.6;
}

img {
    max-width: 100%;
    height: auto;
}

.container {
    width: min(100%, var(--max-width));
    margin: 0 auto;
    padding: 0 1.5rem;
}

.skip-to-content {
    position: absolute;
    top: -999px;
    left: 1rem;
    background-color: var(--color-secondary-orange);
    color: var(--color-dark);
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    z-index: 100;
}

.skip-to-content:focus {
    top: 1rem;
}

.site-header {
    background-color: var(--color-white);
    border-bottom: 1px solid rgba(4, 153, 237, 0.1);
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(6px);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.75rem 1.5rem;
}

.site-header .logo {
    width: clamp(48px, 10vw, 45px);
    height: auto;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: var(--color-neutral-dark);
    text-decoration: none;
    font-weight: 500;
}

.nav-links a:hover,
.nav-links a:focus {
    color: var(--color-primary-dark);
}

.lang-toggle {
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
    border: none;
    border-radius: 999px;
    padding: 0.5rem 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.lang-toggle:hover,
.lang-toggle:focus {
    transform: translateY(-1px);
}

.hero {
    background: radial-gradient(circle at 20% 20%,
            rgba(4, 153, 237, 0.35) 0%,
            rgba(4, 153, 237, 0.18) 22%,
            rgba(4, 153, 237, 0.05) 55%),
        linear-gradient(160deg,
            rgba(4, 153, 237, 0.12) 0%,
            rgba(255, 147, 45, 0.15) 55%,
            rgba(4, 153, 237, 0.08) 100%);
    padding: calc(var(--section-padding) - 2.5rem);
}

.hero-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 3rem;
    align-items: center;
}

.hero-brand {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.hero-logo {
    width: clamp(160px, 32vw, 300px);
    height: auto;
    filter: drop-shadow(0 18px 36px rgba(4, 153, 237, 0.3));
    transform: translateX(42px);
}

.hero-text h1 {
    font-size: clamp(1.75rem, 3.5vw, 1.0rem);
    margin: 0;
    line-height: 1.2;
    color: var(--color-primary-dark);
    text-align: left;
    letter-spacing: 0.03em;
}

.hero-subheading {
    font-size: 1.1rem;
    color: var(--color-neutral-dark);
    margin-bottom: 2rem;
    max-width: 36ch;
}

.kit-form-container {
    max-width: 420px;
    margin-top: 1rem;
}

.waitlist-form {
    display: grid;
    gap: 1rem;
    max-width: 420px;
    padding: 1.5rem;
    background-color: var(--color-white);
    border-radius: 1rem;
    box-shadow: 0 16px 40px rgba(4, 153, 237, 0.1);
}

.form-group {
    display: grid;
    gap: 0.25rem;
}

.form-group label {
    font-weight: 600;
    color: var(--color-neutral-dark);
}

.form-group input[type="email"] {
    padding: 0.75rem 1rem;
    border-radius: 0.75rem;
    border: 1px solid rgba(4, 153, 237, 0.3);
    font-size: 1rem;
    transition: border-color var(--transition-fast),
        box-shadow var(--transition-fast);
}

.form-group input[type="email"]:focus {
    outline: none;
    border-color: var(--color-primary-dark);
    box-shadow: 0 0 0 3px rgba(4, 153, 237, 0.2);
}

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.checkbox-group input {
    margin-top: 0.35rem;
}

.cta-button {
    padding: 0.85rem 1.25rem;
    border-radius: 999px;
    border: none;
    background: linear-gradient(135deg,
            var(--color-primary-sky-blue),
            var(--color-secondary-orange));
    color: var(--color-white);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.cta-button:hover,
.cta-button:focus {
    transform: translateY(-2px);
    box-shadow: 0 16px 32px rgba(4, 153, 237, 0.25);
}

.form-hint {
    font-size: 0.85rem;
    color: var(--color-neutral-mid);
    margin: 0;
}

.form-feedback {
    font-size: 0.9rem;
    margin: 0;
}

.form-feedback.success {
    color: #1b8a34;
}

.form-feedback.error {
    color: #b3261e;
}

.hero-visual {
    display: flex;
    justify-content: center;
}

.device-frame {
    width: clamp(240px, 60vw, 360px);
    aspect-ratio: 9 / 16;
    border-radius: 2rem;
    background: var(--color-neutral-dark);
    display: grid;
    place-items: center;
    padding: 1.5rem;
    position: relative;
    box-shadow: 0 24px 64px rgba(4, 153, 237, 0.25);
}

.hero-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 1.5rem;
    box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.08);
}

.visual-placeholder {
    color: var(--color-white);
    text-align: center;
    line-height: 1.4;
    font-size: 0.95rem;
}

.info-section {
    padding: var(--section-padding) 0;
}

.info-section h2 {
    font-size: clamp(2rem, 4vw, 2.5rem);
    margin-bottom: 2rem;
    color: var(--color-primary-dark);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.step {
    background-color: var(--color-white);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 12px 32px rgba(4, 153, 237, 0.08);
    position: relative;
    overflow: hidden;
}

.step::after {
    content: "";
    position: absolute;
    bottom: -2.5rem;
    right: -2.5rem;
    width: 8rem;
    height: 8rem;
    background: radial-gradient(circle,
            rgba(4, 153, 237, 0.28),
            rgba(4, 153, 237, 0));
    z-index: -1;
}

.alt-bg {
    background:
        linear-gradient(135deg, rgba(4, 153, 237, 0.1) 0%, rgba(4, 153, 237, 0.04) 45%, rgba(255, 147, 45, 0.08) 100%),
        var(--color-neutral-light);
}

.demo-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 3rem;
    align-items: center;
}

.demo-text p {
    margin-bottom: 1rem;
}

.todo-placeholder {
    font-size: 0.9rem;
    color: var(--color-neutral-mid);
    background-color: rgba(4, 153, 237, 0.08);
    border-left: 4px solid var(--color-primary-sky-blue);
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
}

.video-placeholder,
.avatar-placeholder {
    background: repeating-linear-gradient(-45deg,
            rgba(4, 153, 237, 0.1),
            rgba(4, 153, 237, 0.1) 12px,
            rgba(255, 147, 45, 0.1) 12px,
            rgba(255, 147, 45, 0.1) 24px);
    color: var(--color-neutral-mid);
    border-radius: 1.5rem;
    border: 1px dashed rgba(117, 117, 117, 0.4);
    padding: 2rem;
    text-align: center;
    line-height: 1.4;
}

.benefits-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 1.25rem;
}

.benefits-list li {
    padding: 1.5rem;
    border-radius: 1rem;
    background-color: rgba(4, 153, 237, 0.06);
    border-left: 4px solid var(--color-secondary-orange);
}

.faq-list {
    display: grid;
    gap: 1rem;
}

.faq-item {
    background-color: var(--color-white);
    border-radius: 1rem;
    box-shadow: 0 12px 32px rgba(4, 153, 237, 0.08);
    padding: 1rem 1.5rem;
}

.faq-toggle {
    all: unset;
    display: flex;
    width: 100%;
    justify-content: space-between;
    align-items: center;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-neutral-dark);
    cursor: pointer;
}

.faq-toggle::after {
    content: "+";
    font-size: 1.5rem;
    color: var(--color-primary-dark);
    transition: transform var(--transition-fast);
}

.faq-toggle[aria-expanded="true"]::after {
    content: "–";
    transform: rotate(90deg);
}

.faq-toggle:focus {
    outline: 3px solid rgba(4, 153, 237, 0.3);
    border-radius: 0.75rem;
    padding: 0.25rem 0.5rem;
}

.faq-content {
    margin-top: 1rem;
    color: var(--color-neutral-mid);
}

.about-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 3rem;
    align-items: center;
}

.about-text p {
    margin-bottom: 1rem;
}

.author-card {
    margin: 0;
    text-align: center;
    display: grid;
    gap: 1rem;
    justify-items: center;
}

.author-photo {
    /* width: clamp(240px, 32vw, 420px); */
    width: clamp(240px, 36vw, 420px);
    height: clamp(180px, 25vw, 300px);
    object-fit: cover;
    object-position: center 45%;
    border-radius: 28px;
    box-shadow: 0 20px 45px rgba(4, 153, 237, 0.25);
    border: 4px solid rgba(255, 255, 255, 0.8);
}

.author-card figcaption {
    font-size: 0.95rem;
    color: var(--color-neutral-dark);
    line-height: 1.5;
}

.site-footer {
    background-color: var(--color-neutral-dark);
    color: var(--color-white);
    padding: 3rem 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
    align-items: start;
}

.footer-links {
    display: grid;
    gap: 0.75rem;
}

.footer-links a {
    color: var(--color-white);
    text-decoration: none;
}

.footer-links a:hover,
.footer-links a:focus {
    text-decoration: underline;
}

.footer-meta {
    font-size: 0.9rem;
}

.social-proof {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.8);
}

.legal-page {
    background-color: var(--color-neutral-light);
}

.legal-container {
    padding: var(--section-padding) 0;
}

.legal-container h1 {
    color: var(--color-primary-dark);
}

.nav-back {
    color: var(--color-primary-dark);
    text-decoration: none;
    font-weight: 600;
}

.nav-back:hover,
.nav-back:focus {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .header-content {
        flex-wrap: wrap;
    }

    .nav-links {
        flex: 1 1 100%;
        justify-content: space-between;
    }

    .hero {
        padding-top: var(--section-padding);
    }

    .waitlist-form {
        max-width: 100%;
    }

    .site-footer {
        text-align: center;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .hero-brand {
        align-items: flex-start;
    }

    .hero-text h1 {
        text-align: left;
    }
}