/* ===================================
   LANDING PAGE STYLES - ALERTARA QC STYLE
   =================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    --primary-teal: #4C8A89;
    --primary-dark: #3a6b6a;
    --bg-light: #FFFFFF;
    --bg-dark: #0F0F0F;
    --text-dark: #171717;
    --text-muted: #737373;
    --border-light: #E5E5E5;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.5;
}

/* --- Common Components --- */
.landing-container {
    max-width: 1280px;
    margin: 0 auto;
    padding-left: 2rem;
    padding-right: 2rem;
    width: 100%;
}

/* --- Navigation --- */
nav {
    position: sticky;
    top: 0;
    width: 100%;
    height: 80px;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-light);
}

nav .landing-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--text-dark);
}

.nav-brand span {
    color: var(--primary-teal);
}

.nav-links {
    display: flex;
    gap: 32px;
    list-style: none;
}

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
}

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

.nav-actions {
    display: flex;
    gap: 16px;
    align-items: center;
}

.btn {
    padding: 10px 24px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-ghost {
    background: none;
    border: 1px solid var(--border-light);
    color: var(--text-dark);
}

.btn-ghost:hover {
    background-color: #F5F5F5;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
}

/* --- Hero Section --- */
.hero {
    padding: 120px 0 80px;
    text-align: center;
}

.hero .landing-container {
    max-width: 900px;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 800;
    color: var(--text-dark);
    letter-spacing: -0.02em;
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.6;
}

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

.hero-stats {
    padding: 80px 0;
    background-color: #FAFAFA;
    margin-top: 80px;
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
}

.hero-stats .landing-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.stat-card {
    text-align: center;
}

.stat-card h2 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-dark);
}

.stat-card p {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* --- Features --- */
.features {
    padding: 100px 0;
}

.features .landing-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    background: #FFFFFF;
    border: 1px solid var(--border-light);
    padding: 40px;
    border-radius: 12px;
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--primary-teal);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background-color: rgba(76, 138, 137, 0.1);
    color: var(--primary-teal);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    font-size: 1.25rem;
    margin-bottom: 24px;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* --- Mission Section --- */
.mission {
    padding: 80px 0;
    background-color: var(--bg-dark);
    color: #FFFFFF;
}

.mission .landing-container {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 32px;
}

.mission-card {
    padding: 40px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
}

.mission-card h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--primary-teal);
}

.mission-card p {
    color: #A3A3A3;
    line-height: 1.6;
}

/* --- Footer --- */
footer {
    padding: 80px 0 40px;
    border-top: 1px solid var(--border-light);
    background-color: #FFFFFF;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
}

.footer-brand h2 {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 16px;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-col h4 {
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: 12px;
}

.footer-col a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-col a:hover {
    color: var(--primary-teal);
}

.footer-bottom {
    padding-top: 40px;
    border-top: 1px solid var(--border-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* --- Theme Toggle --- */
.theme-toggle {
    position: fixed;
    bottom: 32px;
    right: 32px;
    background: #FFFFFF;
    border: 1px solid var(--border-light);
    padding: 8px;
    border-radius: 50px;
    display: flex;
    gap: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    z-index: 1001;
}

.theme-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    transition: var(--transition);
}

.theme-btn.active {
    background-color: #F5F5F5;
    color: var(--primary-teal);
}

/* --- Mobile Responsive --- */
@media (max-width: 1024px) {
    .features {
        grid-template-columns: 1fr 1fr;
    }

    .mission {
        grid-template-columns: 1fr;
    }

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

    .hero h1 {
        font-size: 3rem;
    }
}

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

    .hero-stats {
        grid-template-columns: 1fr 1fr;
    }

    .features {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

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