/* assets/css/landing.css - ColossusMind Professional Landing Page */

:root {
    --primary: #2563EB;
    /* Corporate Blue */
    --primary-hover: #1D4ED8;
    --secondary: #64748B;
    /* Slate Gray */
    --accent: #10B981;
    /* Emerald */
    --text-main: #0F172A;
    /* Slate 900 */
    --text-muted: #475569;
    /* Slate 600 */
    --bg-main: #FFFFFF;
    --bg-light: #F8FAFC;
    --border: #E2E8F0;
    --container-width: 1200px;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--text-main);
    background-color: var(--bg-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

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

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

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

.mb-60 {
    margin-bottom: 60px;
}

.mt-60 {
    margin-top: 60px;
}

.mt-40 {
    margin-top: 40px;
}

.bg-light {
    background-color: var(--bg-light);
}

.rounded {
    border-radius: 16px;
}

.shadow {
    box-shadow: var(--shadow-lg);
}

/* --- Navbar --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    height: 72px;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    font-size: 28px;
}

.logo-text {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text-main);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a:not(.btn-login) {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-muted);
}

.nav-links a:not(.btn-login):hover {
    color: var(--primary);
}

.btn-login {
    background-color: var(--primary);
    color: white !important;
    padding: 10px 24px;
    border-radius: 9999px;
    font-weight: 600;
    font-size: 14px;
}

.btn-login:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-main);
}

/* --- Buttons --- */
.btn-primary {
    background-color: var(--primary);
    color: white;
    padding: 14px 32px;
    border-radius: 12px;
    font-weight: 600;
    display: inline-block;
    transition: var(--transition);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background-color: white;
    color: var(--text-main);
    padding: 14px 32px;
    border-radius: 12px;
    font-weight: 600;
    border: 1px solid var(--border);
    display: inline-block;
    transition: var(--transition);
}

.btn-secondary:hover {
    background-color: var(--bg-light);
    transform: translateY(-2px);
}

.btn-large {
    font-size: 18px;
    padding: 18px 48px;
}

/* --- Hero --- */
.hero {
    padding: 160px 0 100px;
    overflow: hidden;
}

.hero .container {
    display: flex;
    align-items: center;
    gap: 80px;
}

.hero-content {
    flex: 1;
}

.hero-title {
    font-size: 56px;
    line-height: 1.1;
    font-weight: 800;
    letter-spacing: -1.5px;
    margin-bottom: 24px;
}

.text-gradient {
    color: var(--primary);
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 500px;
}

.hero-cta {
    display: flex;
    gap: 16px;
}

.hero-image {
    flex: 1;
    position: relative;
}

.mockup-container {
    background: white;
    border-radius: 24px;
    padding: 12px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
    transform: perspective(1000px) rotateY(-15deg) rotateX(5deg);
}

.main-mockup {
    border-radius: 16px;
    display: block;
}

/* --- Sections --- */
.section {
    padding: 100px 0;
}

.section-title {
    font-size: 40px;
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 24px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-muted);
}

.section-text {
    font-size: 18px;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.grid {
    display: grid;
    gap: 24px;
}

.col-2 {
    grid-template-columns: repeat(2, 1fr);
}

.col-3 {
    grid-template-columns: repeat(3, 1fr);
}

.items-center {
    align-items: center;
}

.gap-40 {
    gap: 40px;
}

.gap-60 {
    gap: 60px;
}

/* --- Concept --- */
.info-card {
    background: white;
    padding: 40px;
    border-radius: 24px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
}

.info-highlight {
    font-size: 24px;
    font-weight: 600;
    line-height: 1.4;
    color: var(--primary);
    position: relative;
}

.info-highlight::before {
    content: "“";
    position: absolute;
    top: -20px;
    left: -20px;
    font-size: 60px;
    opacity: 0.1;
}

/* --- Features --- */
.feature-card {
    background: white;
    padding: 32px;
    border-radius: 20px;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.feature-mini {
    background: rgba(255, 255, 255, 0.5);
    padding: 24px;
    border-radius: 16px;
    border: 1px dashed var(--border);
}

.mini-title {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
}

/* --- Use Cases --- */
.tabs {
    background: var(--bg-light);
    border-radius: 24px;
    padding: 8px;
}

.tab-header {
    display: flex;
    gap: 8px;
    margin-bottom: 32px;
    background: white;
    padding: 6px;
    border-radius: 16px;
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
    box-shadow: var(--shadow-sm);
}

.tab-btn {
    background: none;
    border: none;
    padding: 12px 24px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-muted);
}

.tab-btn.active {
    background: var(--primary);
    color: white;
}

.tab-pane {
    display: none;
    padding: 20px;
}

.tab-pane.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

.use-case-card {
    background: white;
    padding: 24px;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
}

.use-case-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--primary);
}

/* --- Roadmap --- */
.roadmap-list {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.roadmap-list li {
    position: relative;
    padding-left: 32px;
}

.roadmap-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 8px;
    width: 12px;
    height: 12px;
    background: var(--accent);
    border-radius: 50%;
}

/* --- CTA --- */
.section-cta {
    background: var(--primary);
    color: white;
    border-radius: 40px;
    margin: 50px 24px;
    color: white;
}

.cta-title {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 20px;
}

.cta-subtitle {
    font-size: 20px;
    opacity: 0.9;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.section-cta .btn-primary {
    background: white;
    color: var(--primary);
}

/* --- Footer --- */
.footer {
    padding: 60px 0;
    border-top: 1px solid var(--border);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-muted);
    font-size: 14px;
}

.footer-links {
    display: flex;
    gap: 24px;
}

/* --- Animations --- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

/* --- Responsive --- */
@media (max-width: 991px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
        gap: 40px;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-cta {
        justify-content: center;
    }

    .mockup-container {
        transform: none;
    }

    .hero-title {
        font-size: 42px;
    }
}

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

    .mobile-menu-toggle {
        display: block;
    }

    .col-2,
    .col-3 {
        grid-template-columns: 1fr;
    }

    .section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 32px;
    }

    .cta-title {
        font-size: 32px;
    }
}