/* ============================================
   LeadbaseAI – Global Styles
   Minimalist · Professional · Premium
   ============================================ */

/* ---------- Design Tokens ---------- */
:root {
    --c-primary: #2563EB;
    --c-primary-soft: #3B82F6;
    --c-accent: #6366F1;
    --c-accent-light: rgba(37, 99, 235, 0.08);
    --c-bg: #EDF2F7;
    --c-bg-alt: #E2E8F0;
    --c-surface: #FFFFFF;
    --c-text: #1E293B;
    --c-text-secondary: #64748B;
    --c-text-tertiary: #94A3B8;
    --c-border: #CBD5E1;
    --c-input-bg: #F1F5F9;
    --c-success: #10B981;
    --c-warning: #F59E0B;

    --font-display: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.06);
    --shadow-xl: 0 8px 30px rgba(0, 0, 0, 0.08);

    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

    --radius-sm: 8px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 18px;
    --radius-full: 9999px;
}

/* ---------- Dark Theme ---------- */
[data-theme="dark"] {
    --c-primary: #60A5FA;
    --c-primary-soft: #3B82F6;
    --c-accent: #818CF8;
    --c-accent-light: rgba(96, 165, 250, 0.1);
    --c-bg: #0B0F1A;
    --c-bg-alt: #111827;
    --c-surface: #141923;
    --c-text: #F3F4F6;
    --c-text-secondary: #9CA3AF;
    --c-text-tertiary: #6B7280;
    --c-border: #1F2937;
    --c-input-bg: #1A2030;
    --c-success: #34D399;
    --c-warning: #FBBF24;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.35);
    --shadow-xl: 0 8px 30px rgba(0, 0, 0, 0.45);
}

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

html {
    scroll-behavior: smooth;
    scrollbar-width: none;
    /* Firefox */
}

html::-webkit-scrollbar {
    display: none;
    /* Chrome, Safari, Edge */
}

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

/* ---------- Navbar ---------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(237, 242, 247, 0.82);
    backdrop-filter: blur(16px) saturate(160%);
    -webkit-backdrop-filter: blur(16px) saturate(150%);
    border-bottom: 1px solid var(--c-border);
    z-index: 1000;
    transition: all var(--transition-base);
    animation: slideDown 0.5s ease-out;
}

[data-theme="dark"] .navbar {
    background: rgba(11, 15, 26, 0.8);
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.875rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    text-decoration: none;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.125rem;
    color: var(--c-text);
    transition: opacity var(--transition-fast);
}

.logo:hover {
    opacity: 0.7;
}

.logo-img {
    width: 30px;
    height: 30px;
    border-radius: var(--radius-sm);
}

.nav-links {
    display: flex;
    gap: 1.75rem;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--c-text-secondary);
    font-weight: 500;
    font-size: 0.875rem;
    letter-spacing: 0.01em;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1.5px;
    background: var(--c-primary);
    transition: width var(--transition-base);
    border-radius: 1px;
}

.nav-link:hover {
    color: var(--c-text);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-link-cta {
    background: var(--c-primary);
    color: white;
    padding: 0.4375rem 1.125rem;
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.nav-link-cta::after {
    display: none;
}

.nav-link-cta:hover {
    background: var(--c-primary-soft);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    width: 22px;
    height: 2px;
    background: var(--c-text);
    transition: all var(--transition-base);
}

/* ---------- Theme Toggle — Minimal icon ---------- */
.theme-toggle {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: transparent;
    border: 1.5px solid var(--c-border);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    flex-shrink: 0;
    color: var(--c-text-secondary);
}

.theme-toggle:hover {
    border-color: var(--c-primary);
    color: var(--c-text);
    background: rgba(37, 99, 235, 0.05);
    transform: scale(1.05);
}

.theme-toggle svg {
    width: 18px;
    height: 18px;
    transition: transform var(--transition-base);
}

.theme-toggle:hover svg {
    transform: rotate(30deg);
}

.theme-icon {
    display: block;
}

.theme-icon-hidden {
    display: none;
}

/* ---------- Fade Animations ---------- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

/* ---------- Hero Section ---------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 6rem 2rem 4rem;
    overflow: hidden;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 660px;
    animation: fadeInUp 0.7s cubic-bezier(.16, 1, .3, 1) both;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--c-accent-light);
    color: var(--c-primary);
    padding: 0.375rem 0.875rem;
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    border: 1px solid var(--c-border);
    animation: fadeInUp 0.7s cubic-bezier(.16, 1, .3, 1) 0.1s both;
}

.hero-badge svg {
    animation: spin 6s linear infinite;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1rem;
    color: var(--c-text);
    letter-spacing: -0.03em;
    animation: fadeInUp 0.7s cubic-bezier(.16, 1, .3, 1) 0.15s both;
}

.highlight {
    background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-accent) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
    display: inline-block;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--c-text-secondary);
    margin-bottom: 2rem;
    line-height: 1.7;
    animation: fadeInUp 0.7s cubic-bezier(.16, 1, .3, 1) 0.2s both;
}

.hero-buttons {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 2.5rem;
    animation: fadeInUp 0.7s cubic-bezier(.16, 1, .3, 1) 0.25s both;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    font-family: var(--font-body);
}

.btn-primary {
    background: var(--c-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: var(--c-primary-soft);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: var(--c-text);
    border: 1.5px solid var(--c-border);
}

.btn-secondary:hover {
    border-color: var(--c-primary);
    transform: translateY(-1px);
}

.hero-stats {
    display: flex;
    gap: 2rem;
    align-items: center;
    animation: fadeInUp 0.7s cubic-bezier(.16, 1, .3, 1) 0.3s both;
}

.stat {
    text-align: center;
}

.stat-number {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 800;
    color: var(--c-text);
    line-height: 1;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.8125rem;
    color: var(--c-text-tertiary);
}

.stat-divider {
    width: 1px;
    height: 36px;
    background: var(--c-border);
}

/* ---------- Features Section ---------- */
.features {
    padding: 5rem 2rem;
    background: var(--c-bg-alt);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 3.5rem;
}

.section-tag {
    display: inline-block;
    background: var(--c-accent-light);
    color: var(--c-primary);
    padding: 0.3125rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: 0.875rem;
    border: 1px solid var(--c-border);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 800;
    margin-bottom: 0.75rem;
    color: var(--c-text);
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.0625rem;
    color: var(--c-text-secondary);
    line-height: 1.7;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    background: var(--c-surface);
    padding: 1.75rem;
    border-radius: var(--radius-xl);
    border: 1px solid var(--c-border);
    transition: all var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
    border-color: var(--c-primary);
}

.feature-icon {
    width: 44px;
    height: 44px;
    background: var(--c-accent-light);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
    color: var(--c-primary);
    border: 1px solid var(--c-border);
}

.feature-title {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--c-text);
}

.feature-description {
    color: var(--c-text-secondary);
    line-height: 1.65;
    font-size: 0.9rem;
}

/* ---------- Blog Preview Section ---------- */
.blog-preview {
    padding: 5rem 2rem;
}

.blog-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.view-all {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    color: var(--c-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.875rem;
    transition: gap var(--transition-base);
}

.view-all:hover {
    gap: 0.625rem;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.blog-card {
    background: var(--c-surface);
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid var(--c-border);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
}

.blog-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
    border-color: var(--c-primary);
}

.blog-card-featured {
    grid-column: 1 / -1;
}

@media (min-width: 768px) {
    .blog-card-featured {
        grid-column: span 2;
        flex-direction: row;
    }

    .blog-card-featured .blog-image {
        width: 50%;
    }

    .blog-card-featured .blog-content {
        width: 50%;
    }
}

.blog-image {
    position: relative;
    width: 100%;
    height: 220px;
    overflow: hidden;
}

.blog-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.blog-card:hover .blog-image img {
    transform: scale(1.04);
}

.blog-category {
    position: absolute;
    top: 0.875rem;
    left: 0.875rem;
    background: var(--c-primary);
    color: white;
    padding: 0.3125rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.blog-content {
    padding: 1.375rem 1.5rem;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.blog-meta {
    display: flex;
    gap: 0.875rem;
    margin-bottom: 0.75rem;
    font-size: 0.8125rem;
    color: var(--c-text-tertiary);
}

.blog-date::before {
    content: '📅 ';
}

.blog-reading-time::before {
    content: '⏱️ ';
}

.blog-title {
    font-family: var(--font-display);
    font-size: 1.1875rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--c-text);
    line-height: 1.35;
    letter-spacing: -0.01em;
}

.blog-excerpt {
    color: var(--c-text-secondary);
    line-height: 1.65;
    margin-bottom: 1.25rem;
    flex: 1;
    font-size: 0.9rem;
}

.blog-link {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    color: var(--c-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.8125rem;
    transition: gap var(--transition-base);
}

.blog-link:hover {
    gap: 0.625rem;
}

/* ---------- Newsletter Section ---------- */
.newsletter {
    padding: 5rem 2rem;
    background: linear-gradient(135deg, var(--c-text) 0%, #3D3D3D 100%);
    color: white;
}

[data-theme="dark"] .newsletter {
    background: linear-gradient(135deg, #141923 0%, #1E293B 100%);
}

.newsletter-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr;
    gap: 2.5rem;
    align-items: center;
}

@media (min-width: 768px) {
    .newsletter-container {
        grid-template-columns: 1.5fr 1fr;
    }
}

.newsletter-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 800;
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

.newsletter-subtitle {
    font-size: 1.0625rem;
    opacity: 0.85;
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.newsletter-form {
    max-width: 460px;
}

.form-group {
    display: flex;
    gap: 0.625rem;
    margin-bottom: 0.625rem;
}

.form-group input {
    flex: 1;
    padding: 0.75rem 1.125rem;
    border: 1.5px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-family: var(--font-body);
    background: rgba(255, 255, 255, 0.08);
    color: white;
    transition: all var(--transition-base);
    backdrop-filter: blur(12px);
    outline: none;
}

.form-group input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.form-group input:focus {
    border-color: rgba(255, 255, 255, 0.35);
    background: rgba(255, 255, 255, 0.12);
}

.form-group .btn-primary {
    background: white;
    color: var(--c-text);
}

.form-group .btn-primary:hover {
    background: var(--c-primary);
    color: white;
}

.newsletter-privacy {
    font-size: 0.8125rem;
    opacity: 0.7;
}

.newsletter-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

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

.stat-item .stat-number {
    font-family: var(--font-display);
    font-size: 2.25rem;
    font-weight: 800;
    color: white;
    line-height: 1;
    margin-bottom: 0.375rem;
}

.stat-item .stat-label {
    font-size: 0.8125rem;
    opacity: 0.75;
}

/* ---------- Footer ---------- */
.footer {
    background: var(--c-bg-alt);
    padding: 4rem 2rem 2rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-main {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2.5rem;
    margin-bottom: 2.5rem;
    padding-bottom: 2.5rem;
    border-bottom: 1px solid var(--c-border);
}

@media (min-width: 768px) {
    .footer-main {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .footer-main {
        grid-template-columns: 1.5fr repeat(3, 1fr);
    }
}

.footer-brand {
    max-width: 340px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    text-decoration: none;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.125rem;
    color: var(--c-text);
    margin-bottom: 0.875rem;
}

.footer-logo img {
    width: 30px;
    height: 30px;
    border-radius: var(--radius-sm);
}

.footer-tagline {
    color: var(--c-text-secondary);
    margin-bottom: 1.25rem;
    line-height: 1.65;
    font-size: 0.9rem;
}

.footer-social {
    display: flex;
    gap: 0.75rem;
}

.social-link {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-sm);
    color: var(--c-text-secondary);
    transition: all var(--transition-base);
}

.social-link:hover {
    background: var(--c-primary);
    color: white;
    border-color: var(--c-primary);
    transform: translateY(-1px);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 1.5rem;
}

.footer-column h4 {
    font-family: var(--font-display);
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--c-text);
    font-size: 0.9rem;
}

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

.footer-column li {
    margin-bottom: 0.5rem;
}

.footer-column a {
    color: var(--c-text-secondary);
    text-decoration: none;
    font-size: 0.8125rem;
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: var(--c-primary);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    color: var(--c-text-tertiary);
    font-size: 0.8125rem;
}

.footer-legal {
    display: flex;
    gap: 1.25rem;
}

.footer-legal a {
    color: var(--c-text-tertiary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-legal a:hover {
    color: var(--c-primary);
}

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

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

    .hero {
        min-height: auto;
        padding: 6rem 1.5rem 3rem;
    }

    .hero-stats {
        flex-direction: column;
        align-items: flex-start;
        gap: 1.25rem;
    }

    .stat-divider {
        display: none;
    }

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

    .newsletter-stats {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

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

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .form-group {
        flex-direction: column;
    }

    .form-group .btn {
        width: 100%;
    }
}