/* LearnAI Landing Page Styles */

:root {
    --bg-primary: #ffffff;
    --bg-secondary: #fafafa;
    --bg-accent: #f8f8f8;
    --text-primary: #000000;
    --text-secondary: #1a1a1a;
    --text-muted: #525252;
    --accent-primary: #6b21a8;
    --accent-secondary: #581c87;
    --accent-tertiary: #4c1d95;
    --accent-quaternary: #7c3aed;
    --gradient-primary: linear-gradient(135deg, #6b21a8 0%, #581c87 50%, #4c1d95 100%);
    --gradient-secondary: linear-gradient(135deg, #7c3aed 0%, #6b21a8 100%);
    --gradient-tertiary: linear-gradient(135deg, #6b21a8 0%, #7c3aed 100%);
    --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.9) 0%, rgba(250,250,250,0.7) 100%);
    --border-color: #e8e8e8;
    --border-light: #f5f5f5;
    --shadow-sm: 0 4px 12px rgba(107, 33, 168, 0.12);
    --shadow-md: 0 8px 24px rgba(107, 33, 168, 0.15);
    --shadow-lg: 0 16px 48px rgba(107, 33, 168, 0.20);
    --shadow-xl: 0 24px 64px rgba(107, 33, 168, 0.25);
}

/* Hero */
.learnai-hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
    padding: 120px 0 80px;
}

.learnai-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background:
        radial-gradient(circle at 30% 80%, rgba(107, 33, 168, 0.06) 0%, transparent 40%);
    animation: learnai-float 25s ease-in-out infinite;
    pointer-events: none;
}

@keyframes learnai-float {
    0%, 100% { transform: rotate(0deg) translateY(0px); }
    50% { transform: rotate(2deg) translateY(-30px); }
}

.learnai-hero .hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.learnai-hero .badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 100px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
}

.learnai-hero .badge-dot {
    width: 6px;
    height: 6px;
    background: #16a34a;
    border-radius: 50%;
    animation: learnai-pulse 2s ease-in-out infinite;
}

@keyframes learnai-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.learnai-hero h1 {
    font-size: clamp(42px, 5vw, 56px);
    font-weight: 600;
    line-height: 1.1;
    margin-bottom: 24px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.learnai-hero .subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    line-height: 1.5;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    font-weight: 400;
}

.learnai-hero .subtitle-small {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 40px;
    font-weight: 400;
    font-style: italic;
    opacity: 0.8;
}

/* Signup Form */
.learnai-hero .signup-form,
.cta-section .signup-form {
    display: flex;
    gap: 8px;
    max-width: 500px;
    margin: 0 auto 32px auto;
    align-items: stretch;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 16px;
    padding: 8px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.learnai-hero .signup-form:focus-within,
.cta-section .signup-form:focus-within {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 4px rgba(107, 33, 168, 0.1), var(--shadow-md);
}

.learnai-hero .email-input,
.cta-section .email-input {
    flex: 1;
    padding: 16px 20px;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 16px;
    outline: none;
    font-family: inherit;
}

.learnai-hero .email-input::placeholder,
.cta-section .email-input::placeholder {
    color: var(--text-muted);
}

.learnai-hero .signup-btn,
.cta-section .signup-btn {
    background: var(--gradient-primary);
    color: white;
    padding: 16px 28px;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
    box-shadow: var(--shadow-sm);
}

.learnai-hero .signup-btn:hover,
.cta-section .signup-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.learnai-hero .trust-signals,
.cta-section .trust-signals {
    font-size: 13px;
    color: var(--text-muted);
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

/* Stats */
.stats-section {
    padding: 60px 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 48px;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.stat-number {
    font-size: 48px;
    font-weight: 600;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Recent Issues */
.recent-issues {
    padding: 100px 0;
    background: var(--bg-primary);
}

.recent-issues .section-header {
    text-align: center;
    margin-bottom: 50px;
}

.recent-issues .section-title {
    font-size: 40px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
    line-height: 1.1;
}

.recent-issues .section-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    font-weight: 500;
}

.issues-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.issue-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
    text-decoration: none;
    color: inherit;
    display: block;
}

.issue-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-primary);
}

.issue-featured-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
    display: block;
}

.issue-placeholder {
    width: 100%;
    height: 220px;
    background: linear-gradient(135deg, #f5f5f5 0%, #e5e5e5 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
}

.issue-content {
    padding: 20px;
}

.issue-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.issue-number {
    background: var(--accent-primary);
    color: white;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.issue-date {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 500;
}

.issue-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 0;
    color: var(--text-primary);
    line-height: 1.3;
}

.more-coming {
    text-align: center;
    margin-top: 32px;
    padding: 24px;
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
    box-shadow: var(--shadow-sm);
}

.more-coming p {
    font-size: 15px;
    color: var(--text-secondary);
    font-weight: 500;
    margin: 0;
}

/* Preview Section */
.preview-section {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.preview-container {
    max-width: 900px;
    margin: 0 auto;
}

.preview-box {
    background: var(--gradient-card);
    border: 1px solid rgba(76, 29, 149, 0.15);
    border-radius: 24px;
    padding: 48px;
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(20px);
}

.preview-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--accent-primary);
    color: white;
    padding: 12px 18px;
    border-radius: 14px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
}

.preview-box h2 {
    font-size: 32px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    margin-bottom: 20px;
    line-height: 1.2;
}

.preview-excerpt {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 24px;
}

.preview-excerpt p {
    margin-bottom: 16px;
}

.preview-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    transition: all 0.3s;
}

.preview-cta:hover {
    gap: 12px;
}

/* CTA Section */
.cta-section {
    padding: 100px 0;
    background: var(--bg-accent);
    text-align: center;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-section h2 {
    font-size: 40px;
    font-weight: 600;
    margin-bottom: 20px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.cta-section p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.6;
}

/* Mobile */
@media (max-width: 768px) {
    .learnai-hero {
        min-height: 70vh;
        padding: 100px 0 60px;
    }

    .learnai-hero h1 {
        font-size: 36px;
    }

    .learnai-hero .signup-form,
    .cta-section .signup-form {
        flex-direction: column;
        gap: 0;
        padding: 16px;
    }

    .learnai-hero .email-input,
    .cta-section .email-input {
        width: 100%;
        margin-bottom: 16px;
    }

    .learnai-hero .signup-btn,
    .cta-section .signup-btn {
        width: 100%;
    }

    .learnai-hero .subtitle {
        font-size: 18px;
    }

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

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .issues-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .preview-box {
        padding: 32px 24px;
    }
}