/* --- Variables & Reset --- */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;700&family=Outfit:wght@500;600;700&display=swap');

:root {
    --bg-main: #0a0a0a;
    --bg-card: rgba(25, 25, 25, 0.6);
    --border-color: rgba(255, 255, 255, 0.08);
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --primary-teal: #2dd4bf;
    --cyan-icons: #00ffff;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, .logo {
    font-family: 'Outfit', sans-serif;
}

/* --- Ambient Glow --- */
.ambient-glow {
    position: absolute;
    top: -20vh;
    left: 50%;
    transform: translateX(-50%);
    width: 80vw;
    height: 50vh;
    background: radial-gradient(ellipse at center, rgba(45, 212, 191, 0.15) 0%, rgba(10, 10, 10, 0) 70%);
    filter: blur(60px);
    z-index: -1;
    pointer-events: none;
}

/* --- Layout --- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* --- Navbar --- */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 32px 0;
}

.logo {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.logo span {
    font-size: 0.8rem;
    color: var(--primary-teal);
    background: rgba(45, 212, 191, 0.1);
    padding: 2px 8px;
    border-radius: 12px;
    margin-left: 8px;
    font-weight: 500;
}

.lang-switch-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    background: var(--bg-card);
    padding: 8px 16px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
}

.lang-switch-btn:hover {
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.05);
}

/* --- Hero Section --- */
.hero {
    text-align: center;
    padding: 80px 0 100px;
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 24px;
}

.hero p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 650px;
    margin: 0 auto 40px;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.btn {
    padding: 14px 28px;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background-color: var(--text-primary);
    color: var(--bg-main);
}

.btn-primary:hover {
    background-color: #e0e0e0;
}

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

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-kofi {
    background-color: #FF5E5B;
    color: #ffffff;
}

.btn-kofi:hover {
    background-color: #ff4744;
}

/* --- Bento Grid --- */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 20px;
    margin-bottom: 120px;
}

.bento-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 36px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: transform 0.2s, border-color 0.2s;
}

.bento-card:hover {
    border-color: rgba(45, 212, 191, 0.3);
    transform: translateY(-2px);
}

.card-icon {
    font-size: 1.6rem;
    margin-bottom: 24px;
}

.bento-card h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.bento-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* --- Architecture Section --- */
.architecture {
    border-top: 1px solid var(--border-color);
    padding: 100px 0;
}

.architecture h2 {
    font-size: 2.25rem;
    font-weight: 600;
    letter-spacing: -0.7px;
    margin-bottom: 56px;
}

.arch-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.arch-step h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--primary-teal);
}

.arch-step p {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* --- Footer --- */
footer {
    border-top: 1px solid var(--border-color);
    padding: 48px 0;
    text-align: center;
}

.footer-content p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}