/* deploy bump */
/* ===== CSS Variables ===== */
:root {
    /* Colors */
    --color-bg: #ffffff;
    --color-text: #1a1a1a;
    --color-text-muted: #6b6b6b;
    --color-border: #e0e0e0;
    --color-surface: #f7f7f5;
    --color-accent: #8fa3c4;
    --color-accent-light: #e2e9f4;
    --color-primary: #1a1a1a;
    --color-primary-hover: #333333;
    --color-white: #ffffff;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    --space-3xl: 8rem;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-serif: Georgia, 'Times New Roman', Times, serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.75rem;
    --font-size-3xl: 2.5rem;
    --font-size-hero: clamp(2.5rem, 6vw, 4.5rem);

    /* Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-pill: 999px;

    /* Widths */
    --max-width: 1120px;
    --max-width-narrow: 720px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
    list-style: none;
}

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

.container--narrow {
    max-width: var(--max-width-narrow);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4em;
    font-family: var(--font-sans);
    font-size: var(--font-size-sm);
    font-weight: 500;
    line-height: 1;
    padding: 0.65em 1.3em;
    border-radius: var(--radius-pill);
    transition: background 0.2s, color 0.2s, border-color 0.2s;
    cursor: pointer;
    white-space: nowrap;
}

.btn-outline {
    border: 1px solid var(--color-border);
    background: transparent;
    color: var(--color-text);
}

.btn-outline:hover {
    border-color: var(--color-text);
    background: var(--color-surface);
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
    border: 1px solid var(--color-primary);
}

.btn-primary:hover {
    background: var(--color-primary-hover);
}

/* ===== Header ===== */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-sm) var(--space-md);
}

.nav-logo {
    display: flex;
    align-items: center;
}

.nav-logo .nav-logo-img {
    height: 36px;
    width: auto;
    max-width: none;
    display: block;
    object-fit: contain;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.nav-links a {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    transition: color 0.2s;
}

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

/* Mobile toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: transform 0.3s, opacity 0.3s;
}

/* ===== Hero ===== */
.hero {
    padding: var(--space-3xl) 0 var(--space-xl);
    text-align: center;
    overflow: hidden;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: var(--font-size-hero);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-xl);
    color: var(--color-text);
}

/* Device mockup */
.device-wrapper {
    position: relative;
    display: inline-block;
    width: 100%;
    max-width: 780px;
    margin: 0 auto;
}

.device-pill {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 110%;
    height: 85%;
    background: var(--color-accent);
    border-radius: 40% 40% 40% 40% / 50% 50% 50% 50%;
    opacity: 0.25;
    z-index: 0;
}

.device-frame {
    position: relative;
    z-index: 1;
    background: var(--color-text);
    border-radius: var(--radius-lg);
    padding: 12px 12px 28px;
    box-shadow:
        0 20px 60px rgba(0, 0, 0, 0.15),
        0 4px 16px rgba(0, 0, 0, 0.08);
}

.device-frame::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: #444;
    border-radius: 4px;
    margin: 10px auto 0;
}

.device-screen {
    background: var(--color-surface);
    border-radius: var(--radius-sm);
    overflow: hidden;
    aspect-ratio: 16 / 10;
    position: relative;
}

.device-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.device-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    inset: 0;
    background: var(--color-surface);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    font-style: italic;
}

/* If image loads, hide placeholder by default */
.device-img + .device-placeholder {
    display: none;
}

/* ===== Features ===== */
.features {
    padding: var(--space-xl) 0 var(--space-2xl);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
}

.feature-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: box-shadow 0.2s;
}

.feature-card:hover {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    background: var(--color-accent-light);
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.feature-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

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

/* ===== What is BERI ===== */
.what-is {
    padding: var(--space-2xl) 0;
}

.section-title {
    font-family: var(--font-serif);
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}

.what-is p {
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
    line-height: 1.7;
}

.what-is .btn {
    margin-top: var(--space-md);
}

/* ===== About ===== */
.about {
    padding: var(--space-2xl) 0;
    background: var(--color-surface);
}

.about p {
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
    line-height: 1.7;
}

.about-list {
    list-style: disc;
    padding-left: 1.25em;
    margin-bottom: var(--space-sm);
}

.about-list li {
    color: var(--color-text-muted);
    line-height: 1.7;
    margin-bottom: var(--space-xs);
}

.about .btn {
    margin-top: var(--space-md);
}

/* ===== Contact ===== */
.contact {
    padding: var(--space-2xl) 0;
}

.contact-methods {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.contact-methods .btn svg {
    flex-shrink: 0;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.contact-form label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-bottom: -0.5rem;
}

.contact-form input,
.contact-form textarea {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    padding: 0.7em 0.9em;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    color: var(--color-text);
    transition: border-color 0.2s;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--color-accent);
}

.contact-form textarea {
    resize: vertical;
}

.contact-submit {
    align-self: flex-start;
    margin-top: var(--space-xs);
}

/* ===== Footer ===== */
.footer {
    border-top: 1px solid var(--color-border);
    padding: var(--space-md) 0;
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.footer-copy {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.footer-links {
    display: flex;
    gap: var(--space-md);
}

.footer-links a {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--color-text);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    :root {
        --space-xl: 3rem;
        --space-2xl: 4rem;
        --space-3xl: 5rem;
    }

    /* Mobile nav */
    .nav-toggle {
        display: flex;
        z-index: 101;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        width: 260px;
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-md);
        padding: 5rem var(--space-lg) var(--space-lg);
        background: var(--color-bg);
        border-left: 1px solid var(--color-border);
        transform: translateX(100%);
        transition: transform 0.3s ease;
        z-index: 100;
    }

    .nav-menu.is-open {
        transform: translateX(0);
    }

    .nav-links {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-sm);
    }

    .nav-links a {
        font-size: var(--font-size-base);
    }

    /* Hamburger animation */
    .nav-toggle.is-active span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .nav-toggle.is-active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.is-active span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    /* Features stack */
    .features-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-sm);
    }

    .feature-card {
        padding: var(--space-md);
    }

    /* Footer stack */
    .footer-inner {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        justify-content: center;
    }

    /* Device */
    .device-frame {
        padding: 8px 8px 20px;
    }

    .device-pill {
        width: 120%;
    }
}

@media (max-width: 480px) {
    .features-grid {
        grid-template-columns: 1fr;
    }

    .hero {
        padding: var(--space-2xl) 0 var(--space-lg);
    }

    .contact-methods {
        flex-direction: column;
    }

    .contact-methods .btn {
        justify-content: center;
    }
}