/* ========================================
   MODERN LANDING PAGE STYLES
   ======================================== */

/* CSS Variables for consistent theming */
:root {
    --primary-color: #1e3a5f;
    --primary-dark: #0f2a44;
    --secondary-color: #5a6c7d;
    --accent-color: #2d5a3d;
    --success-color: #2d5a3d;
    --warning-color: #b8860b;
    --gradient-start: #1e3a5f;
    --gradient-end: #2d5a3d;
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-light: #718096;
    --bg-light: #f7fafc;
    --bg-white: #ffffff;
    --border-light: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Modern reset and base styles */
.modern-landing {
    font-family: 'Inter', 'Segoe UI', 'Roboto', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

.modern-landing * {
    box-sizing: border-box;
}

/* Container styles */
.container-modern {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Typography */
.text-gradient {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========================================
   SECTION LAYOUT
   ======================================== */

.section-padding {
    padding: 4rem 0;
}

.section-padding-lg {
    padding: 5rem 0;
}

.section-padding-sm {
    padding: 3rem 0;
}

/* ========================================
   MODERN FORMS
   ======================================== */

.modern-form-container {
    max-width: 450px;
    margin: 3rem auto;
    background: white;
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.modern-form-title {
    color: var(--primary-color);
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    text-align: center;
    margin-bottom: 2rem;
    font-size: 1.8rem;
}

.modern-form-group {
    margin-bottom: 1.5rem;
}

.modern-form-label {
    display: block;
    color: var(--text-primary);
    font-weight: 500;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.modern-form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-light);
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
    background: var(--bg-light);
}

.modern-form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.1);
    background: white;
}

.modern-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.modern-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(30, 58, 95, 0.3);
    color: white;
    text-decoration: none;
}

.modern-btn-secondary {
    background: var(--secondary-color);
    color: white;
}

.modern-btn-secondary:hover {
    background: var(--text-primary);
    color: white;
}

.modern-btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.modern-btn-outline:hover {
    background: var(--primary-color);
    color: white;
}

.modern-alert {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    border-left: 4px solid var(--primary-color);
}

.modern-alert-success {
    background: #d4edda;
    color: #155724;
    border-left-color: var(--success-color);
}

.modern-alert-error {
    background: #f8d7da;
    color: #721c24;
    border-left-color: #dc3545;
}

.modern-alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border-left-color: var(--accent-color);
}

/* ========================================
   MODERN TABLES
   ======================================== */

.modern-table {
    width: 100%;
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
}

.modern-table th {
    background: var(--primary-color);
    color: white;
    font-weight: 600;
    padding: 1rem;
    text-align: left;
}

.modern-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-light);
}

.modern-table tr:hover {
    background: var(--bg-light);
}

/* ========================================
   MODERN CARDS
   ======================================== */

.modern-card {
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: var(--transition);
}

.modern-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.modern-card-header {
    color: var(--primary-color);
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-light);
}

.modern-card-body {
    color: var(--text-primary);
    line-height: 1.6;
}

/* ========================================
   MODERN NAVIGATION ENHANCEMENTS
   ======================================== */

.navbar-nav .nav-link {
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    margin: 0 0.2rem;
    transition: var(--transition);
}

.navbar-nav .nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

.dropdown-menu {
    border: none;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border-radius: 8px;
}

.dropdown-item {
    padding: 0.75rem 1rem;
    transition: var(--transition);
}

.dropdown-item:hover {
    background: var(--bg-light);
    color: var(--primary-color);
}

/* ========================================
   HERO SECTION
   ======================================== */

.hero-section {
    min-height: unset;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    color: white;
    position: relative;
    overflow: hidden;
    padding: 2.5rem 0;
    border-radius: 10px;
    margin: 1rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="0.5" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    flex: 1;
    max-width: 600px;
    z-index: 2;
    position: relative;
    padding: 2rem;
}

.hero-badge {
    display: inline-block;
    margin-bottom: 1.5rem;
}

.badge-text {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-xl);
    font-size: 0.875rem;
    font-weight: 500;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 2rem;
    max-width: 500px;
}

.hero-stats {
    display: flex;
    gap: 3rem;
    margin: 2rem 0;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.stat-item {
    text-align: center;
    min-width: 120px;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: #d4af37;
    line-height: 1;
}

.stat-label {
    display: block;
    font-size: 0.95rem;
    opacity: 0.9;
    margin-top: 0.5rem;
    font-weight: 500;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    z-index: 2;
    padding: 2rem;
}

.floating-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: var(--radius-xl);
    padding: 1.5rem;
    box-shadow: var(--shadow-xl);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    animation: float 6s ease-in-out infinite;
    max-width: 400px;
    color: var(--text-primary);
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(1deg); }
}

.hero-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
}

.prediction-overlay {
    space-y: 1rem;
}

.prediction-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    margin-bottom: 0.5rem;
}

.prediction-label {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.prediction-value {
    font-weight: 700;
    color: var(--primary-color);
}

.confidence {
    font-size: 0.75rem;
    color: var(--success-color);
    font-weight: 500;
}

/* ========================================
   USER DASHBOARD
   ======================================== */

.user-dashboard {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.dashboard-card {
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

.dashboard-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.dashboard-card.centered {
    grid-column: 1 / -1;
    text-align: center;
    max-width: 500px;
    margin: 0 auto;
}

.dashboard-card h3 {
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
    font-weight: 600;
}

.dashboard-card p {
    opacity: 0.8;
    margin-bottom: 1.5rem;
}

/* ========================================
   MODERN BUTTONS
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
}

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

.btn-primary-modern:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: white;
    text-decoration: none;
}

.btn-outline-modern {
    background: transparent;
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-outline-modern:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: white;
    color: white;
    text-decoration: none;
}

.btn-primary-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-lg);
}

.btn-primary-large:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
    color: white;
    text-decoration: none;
}

.btn-outline-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline-large:hover {
    background: var(--primary-color);
    color: white;
    text-decoration: none;
}

/* ========================================
   SECTIONS
   ======================================== */

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   FEATURES SECTION
   ======================================== */

.features-section {
    padding: 6rem 0;
    background: var(--bg-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: var(--transition);
    text-align: center;
}

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

.feature-icon {
    width: 4rem;
    height: 4rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 1.5rem;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========================================
   WORKFLOW SECTION
   ======================================== */

.workflow-section {
    padding: 6rem 0;
    background: white;
}

.workflow-steps {
    display: flex;
    align-items: center;
    gap: 2rem;
    overflow-x: auto;
    padding: 2rem 0;
}

.workflow-step {
    min-width: 280px;
    text-align: center;
    position: relative;
}

.step-number {
    width: 4rem;
    height: 4rem;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 1.5rem;
}

.step-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.step-content p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.step-visual {
    font-size: 2rem;
    color: var(--accent-color);
}

.step-connector {
    flex: 1;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    min-width: 50px;
}

/* ========================================
   IMPACT SECTION
   ======================================== */

.impact-section {
    padding: 6rem 0;
    background: var(--bg-light);
}

.impact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.impact-text h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.impact-text p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 2rem;
}

.impact-highlights {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: white;
    padding: 1rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.highlight-item i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

.research-card {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.research-card h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.publication-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-light);
}

.pub-journal {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 0.875rem;
}

.pub-title {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ========================================
   PARTNERS SECTION
   ======================================== */

.partners-section {
    padding: 6rem 0;
    background: white;
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.partner-card {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition);
}

.partner-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.partner-logo {
    height: 80px;
    object-fit: contain;
    margin-bottom: 1rem;
}

.partner-card h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.partner-card p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.funding-acknowledgment {
    text-align: center;
    padding: 2rem;
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.funding-logo {
    height: 60px;
    object-fit: contain;
}

/* ========================================
   CTA SECTION
   ======================================== */

.cta-section-modern {
    padding: 6rem 0;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-content p {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.cta-note {
    font-size: 0.875rem;
    opacity: 0.7;
    margin: 0;
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

@media (max-width: 768px) {
    .hero-section {
        flex-direction: column;
        text-align: center;
        min-height: auto;
        padding: 3rem 0;
        margin: 0.5rem;
        border-radius: 8px;
    }

    .hero-content, .hero-visual {
        flex: none;
        max-width: 100%;
    }

    .hero-stats {
        justify-content: center;
        gap: 2rem;
        margin: 2rem 0;
    }

    .stat-item {
        min-width: 100px;
    }

    .stat-number {
        font-size: 2rem;
    }

    .workflow-steps {
        flex-direction: column;
        align-items: stretch;
    }

    .step-connector {
        height: 50px;
        width: 2px;
        align-self: center;
        background: linear-gradient(180deg, var(--primary-color), var(--accent-color));
    }

    .impact-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .container-modern {
        padding: 0 1rem;
    }

    .cta-actions {
        flex-direction: column;
        align-items: center;
    }

    .btn-primary-large, .btn-outline-large {
        width: 100%;
        max-width: 300px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .section-header h2 {
        font-size: 1.75rem;
    }

    .impact-text h2 {
        font-size: 1.75rem;
    }

    .cta-content h2 {
        font-size: 1.75rem;
    }
}