/* ===================================
   CSS RESET & BASE STYLES
   =================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette */
    --primary-blue: #3B82F6;
    --primary-blue-dark: #2563EB;
    --primary-blue-light: #60A5FA;
    --secondary-orange: #F97316;
    --secondary-orange-dark: #EA580C;
    --secondary-orange-light: #FB923C;
    --bg-light: #F5F5F5;
    --white: #FFFFFF;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
}

body {
    font-family: var(--font-family);
    background: var(--bg-light);
    color: var(--gray-800);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-container {
    flex: 1;
    width: 100%;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.hidden {
    display: none !important;
}

/* ===================================
   TYPOGRAPHY
   =================================== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--gray-900);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

h5 {
    font-size: 1.125rem;
}

h6 {
    font-size: 1rem;
}

p {
    margin-bottom: var(--spacing-sm);
}

/* ===================================
   HEADER
   =================================== */
.header {
    background: var(--white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--gray-200);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    gap: var(--spacing-md);
}

.logo-section {
    cursor: pointer;
    transition: opacity var(--transition-fast);
}

.logo-section:hover {
    opacity: 0.8;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-blue);
    margin: 0;
}

.tagline-small {
    font-size: 0.75rem;
    color: var(--gray-500);
    font-weight: 400;
    margin: 0;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-link {
    color: var(--gray-700);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
}

.nav-link:hover {
    color: var(--primary-blue);
    background: var(--gray-100);
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.user-name {
    font-weight: 600;
    color: var(--gray-800);
}

.user-score {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-dark));
    color: var(--white);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-lg);
    font-weight: 700;
    font-size: 0.875rem;
}

/* Language Selector */
.language-selector {
    padding: 0.5rem;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: 0.875rem;
    background: var(--white);
    cursor: pointer;
    transition: border-color var(--transition-fast);
    font-weight: 600;
}

.language-selector:focus {
    outline: none;
    border-color: var(--primary-blue);
}

.language-selector:hover {
    border-color: var(--primary-blue);
}

/* Admin Badge */
.admin-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--secondary-orange), var(--secondary-orange-dark));
    color: var(--white);
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.625rem;
    font-weight: 800;
    margin-left: 0.5rem;
    letter-spacing: 0.05em;
}

/* Admin-only elements */
.admin-only {
    display: none;
}

.admin-only.visible {
    display: inline-block;
}

/* Trend State Badges */
.trend-state-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 600;
    margin-top: 0.5rem;
}

.state-open {
    background: #d1fae5;
    color: #065f46;
}

.state-voting-closed {
    background: #fed7aa;
    color: #9a3412;
}

.state-awaiting-resolution {
    background: #dbeafe;
    color: #1e40af;
}

.state-resolved {
    background: #e5e7eb;
    color: #374151;
}

/* ===================================
   BUTTONS
   =================================== */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    min-height: 44px;
    /* Touch-friendly */
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    font-family: var(--font-family);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-dark));
    color: var(--white);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary-orange), var(--secondary-orange-dark));
    color: var(--white);
    box-shadow: var(--shadow-md);
}

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

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

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

.btn-logout {
    background: var(--gray-200);
    color: var(--gray-700);
    padding: 0.5rem 1rem;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-logout:hover {
    background: var(--gray-300);
}

.btn-google {
    background: var(--white);
    color: var(--gray-700);
    border: 2px solid var(--gray-300);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
}

.btn-google:hover {
    border-color: var(--primary-blue);
    box-shadow: var(--shadow-md);
}

/* ===================================
   LANDING PAGE
   =================================== */
.landing-page {
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    overflow: hidden;
}

.landing-page::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
    animation: backgroundMove 20s linear infinite;
}

@keyframes backgroundMove {
    0% {
        transform: translate(0, 0);
    }

    100% {
        transform: translate(100px, 100px);
    }
}

.landing-content {
    text-align: center;
    color: var(--white);
    z-index: 1;
    position: relative;
    max-width: 800px;
    padding: var(--spacing-xl);
}

.landing-logo {
    font-size: 4rem;
    font-weight: 900;
    margin-bottom: var(--spacing-sm);
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    animation: fadeInDown 0.8s ease-out;
}

.landing-tagline {
    font-size: 1.5rem;
    font-weight: 300;
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.landing-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

/* ===================================
   LOGIN PAGE
   =================================== */
.login-page {
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) var(--spacing-md);
}

.login-card {
    background: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    max-width: 450px;
    width: 100%;
    text-align: center;
    animation: scaleIn 0.5s ease-out;
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

.login-logo {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.login-title {
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.login-subtitle {
    color: var(--gray-600);
    margin-bottom: var(--spacing-xl);
}

.login-divider {
    margin: var(--spacing-lg) 0;
    text-align: center;
    position: relative;
}

.login-divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gray-300);
}

.login-divider span {
    background: var(--white);
    padding: 0 var(--spacing-sm);
    position: relative;
    color: var(--gray-500);
    font-size: 0.875rem;
}

.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--gray-300);
    border-top-color: var(--primary-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ===================================
   DASHBOARD
   =================================== */
.dashboard-page {
    padding: var(--spacing-xl) 0;
}

.dashboard-header {
    margin-bottom: var(--spacing-xl);
}

.dashboard-title {
    margin-bottom: var(--spacing-sm);
}

.dashboard-subtitle {
    color: var(--gray-600);
}

.dashboard-filters {
    margin-bottom: var(--spacing-lg);
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.filter-label {
    font-weight: 600;
    color: var(--gray-700);
}

.filter-select {
    padding: 0.5rem 1rem;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: 1rem;
    background: var(--white);
    cursor: pointer;
    transition: border-color var(--transition-fast);
}

.filter-select:focus {
    outline: none;
    border-color: var(--primary-blue);
}

.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.empty-state-title {
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.empty-state-text {
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
}

.charts-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.chart-card {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.chart-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.chart-title {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
    color: var(--gray-800);
}

.trends-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.trend-card {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--primary-blue);
    transition: all var(--transition-normal);
}

.trend-card:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.trend-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: var(--spacing-sm);
}

.trend-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-900);
}

.trend-category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--gray-100);
    color: var(--gray-700);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 600;
}

.trend-stats {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-sm);
}

.trend-stat {
    font-size: 0.875rem;
    color: var(--gray-600);
}

.trend-stat strong {
    color: var(--primary-blue);
    font-weight: 700;
}

/* ===================================
   PREDICTION FORM
   =================================== */
.predict-page {
    padding: var(--spacing-xl) 0;
    max-width: 700px;
    margin: 0 auto;
}

.form-card {
    background: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.form-title {
    margin-bottom: var(--spacing-sm);
}

.form-subtitle {
    color: var(--gray-600);
    margin-bottom: var(--spacing-xl);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: var(--spacing-xs);
}

.form-input,
.form-select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary-blue);
}

.radio-group {
    display: flex;
    gap: var(--spacing-md);
}

.radio-option {
    flex: 1;
}

.radio-label {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.radio-label:hover {
    border-color: var(--primary-blue);
    background: var(--gray-100);
}

.radio-label input[type="radio"] {
    margin-right: var(--spacing-xs);
}

.radio-label input[type="radio"]:checked+span {
    font-weight: 600;
}

.radio-option input[type="radio"]:checked~.radio-label {
    border-color: var(--primary-blue);
    background: rgba(59, 130, 246, 0.1);
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.success-message {
    background: linear-gradient(135deg, #10b981, #059669);
    color: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    margin-top: var(--spacing-lg);
    animation: slideInUp 0.5s ease-out;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

.success-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

/* ===================================
   PROFILE PAGE
   =================================== */
.profile-page {
    padding: var(--spacing-xl) 0;
}

.profile-header {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-dark));
    color: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.profile-avatar {
    font-size: 4rem;
    margin-bottom: var(--spacing-sm);
}

.profile-name {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
}

.profile-score {
    font-size: 1.25rem;
    opacity: 0.9;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    color: var(--gray-600);
    font-size: 0.875rem;
}

.badges-section {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
}

.badges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: var(--spacing-md);
}

.badge {
    text-align: center;
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    background: var(--gray-100);
    transition: all var(--transition-normal);
}

.badge.unlocked {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.badge:hover {
    transform: scale(1.05);
}

.badge-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xs);
}

.badge-name {
    font-weight: 600;
    font-size: 0.875rem;
}

.history-section {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.history-table {
    width: 100%;
    border-collapse: collapse;
}

.history-table th {
    text-align: left;
    padding: var(--spacing-sm);
    border-bottom: 2px solid var(--gray-300);
    color: var(--gray-700);
    font-weight: 600;
}

.history-table td {
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--gray-200);
}

.history-table tr:hover {
    background: var(--gray-100);
}

.opinion-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 600;
}

.opinion-positive {
    background: #d1fae5;
    color: #065f46;
}

.opinion-negative {
    background: #fee2e2;
    color: #991b1b;
}

.status-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 600;
}

.status-active {
    background: #dbeafe;
    color: #1e40af;
}

.status-soon {
    background: #fef3c7;
    color: #92400e;
}

.status-expired {
    background: #d1fae5;
    color: #065f46;
}

.status-pending {
    background: #f3f4f6;
    color: #6b7280;
}

/* ===================================
   FOOTER
   =================================== */
.footer {
    background: var(--gray-900);
    color: var(--white);
    padding: var(--spacing-lg) 0;
    text-align: center;
    margin-top: auto;
}

.footer p {
    margin: 0;
    opacity: 0.8;
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .header-content {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
    }

    .landing-logo {
        font-size: 2.5rem;
    }

    .landing-tagline {
        font-size: 1.125rem;
    }

    .landing-buttons {
        flex-direction: column;
        width: 100%;
    }

    .landing-buttons .btn {
        width: 100%;
    }

    .charts-section {
        grid-template-columns: 1fr;
    }

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

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

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

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

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

    .history-table {
        font-size: 0.875rem;
    }
}