/**
 * Core4 - Shared Styles (Mobile Optimized)
 */

:root {
    --primary: #581c87;
    --primary-light: #7c3aed;
    --bg-dark: #1e1b4b;
    --bg-gradient-start: #581c87;
    --bg-gradient-mid: #1e3a8a;
    --bg-gradient-end: #312e81;
    --text-white: #ffffff;
    --text-muted: #c4b5fd;
    --text-dim: rgba(255, 255, 255, 0.5);
    --card-bg: rgba(255, 255, 255, 0.1);
    --card-border: rgba(255, 255, 255, 0.2);
    --success: #22c55e;
    --error: #ef4444;
    --warning: #f59e0b;
    
    /* Mobile-friendly sizing */
    --touch-target: 44px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

html {
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-start), var(--bg-gradient-mid), var(--bg-gradient-end));
    min-height: 100vh;
    min-height: -webkit-fill-available;
    color: var(--text-white);
    line-height: 1.5;
    font-size: 16px;
    padding-bottom: env(safe-area-inset-bottom);
}

/* Header */
.header {
    padding: var(--spacing-md);
    padding-top: calc(var(--spacing-md) + env(safe-area-inset-top));
    background: rgba(0, 0, 0, 0.2);
}

.header-content {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-sm);
}

.header-title {
    font-size: 1.35rem;
    font-weight: bold;
}

.header-subtitle {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Navigation */
.nav {
    display: flex;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    max-width: 1000px;
    margin: 0 auto;
    flex-wrap: wrap;
    justify-content: center;
}

.nav-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    min-height: var(--touch-target);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 9999px;
    background: var(--card-bg);
    color: var(--text-white);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.2s;
}

.nav-btn:hover, .nav-btn:active {
    background: rgba(255, 255, 255, 0.2);
}

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

/* Main Content */
.main-content {
    max-width: 1000px;
    margin: 0 auto;
    padding: var(--spacing-md);
    padding-bottom: calc(var(--spacing-lg) + env(safe-area-inset-bottom));
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    min-height: var(--touch-target);
    border-radius: 0.75rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    font-size: 1rem;
}

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

.btn-primary:hover, .btn-primary:active {
    background: #16a34a;
}

.btn-ghost {
    background: var(--card-bg);
    color: white;
}

.btn-ghost:hover, .btn-ghost:active {
    background: rgba(255, 255, 255, 0.2);
}

.btn-small {
    padding: var(--spacing-xs) var(--spacing-sm);
    min-height: 36px;
    font-size: 0.875rem;
}

/* Cards */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 1rem;
    padding: var(--spacing-lg);
    border: 1px solid var(--card-border);
    margin-bottom: var(--spacing-lg);
}

.card-title {
    font-size: 1.2rem;
    font-weight: bold;
    margin-bottom: var(--spacing-md);
}

/* Forms */
.input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    min-height: var(--touch-target);
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--card-border);
    border-radius: 0.75rem;
    color: white;
    font-size: 16px; /* Prevents zoom on iOS */
}

.input::placeholder {
    color: var(--text-dim);
}

.input:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.5);
}

.form-row {
    margin-bottom: var(--spacing-md);
}

.form-row label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--text-muted);
}

.form-hint {
    font-size: 0.875rem;
    color: var(--text-dim);
    margin-top: var(--spacing-sm);
}

/* Alerts */
.alert {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 0.5rem;
    margin-bottom: var(--spacing-md);
}

.alert-success {
    background: rgba(34, 197, 94, 0.2);
    border: 1px solid rgba(34, 197, 94, 0.5);
    color: #86efac;
}

.alert-error {
    background: rgba(239, 68, 68, 0.2);
    border: 1px solid rgba(239, 68, 68, 0.5);
    color: #fca5a5;
}

/* Matchup / Voting - MOBILE FIRST */
.matchup-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.choice-btn {
    width: 100%;
    padding: var(--spacing-lg);
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 2px solid var(--card-border);
    border-radius: 1rem;
    cursor: pointer;
    transition: all 0.2s;
    color: white;
    text-align: center;
    -webkit-user-select: none;
    user-select: none;
}

.choice-btn:active {
    transform: scale(0.98);
    background: rgba(255, 255, 255, 0.2);
}

.choice-btn.winner {
    background: var(--success);
    border-color: var(--success);
    transform: scale(1.02);
}

.choice-btn.loser {
    background: rgba(239, 68, 68, 0.5);
    border-color: var(--error);
    transform: scale(0.95);
    opacity: 0.5;
}

.choice-image {
    width: 100%;
    height: 120px;
    object-fit: cover;
    border-radius: 0.5rem;
    margin-bottom: var(--spacing-md);
}

.choice-name {
    font-size: 1.4rem;
    font-weight: bold;
    line-height: 1.3;
}

.choice-meta {
    font-size: 0.75rem;
    color: var(--text-dim);
    margin-top: var(--spacing-xs);
}

.skip-container {
    text-align: center;
    margin-top: var(--spacing-md);
}

.stats-footer {
    text-align: center;
    margin-top: var(--spacing-lg);
    color: var(--text-dim);
    font-size: 0.875rem;
}

/* Daily Limit */
.limit-reached {
    text-align: center;
    padding: 3rem var(--spacing-md);
}

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

.limit-reached h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.limit-reached p {
    color: var(--text-muted);
}

/* Rankings */
.update-notice {
    background: rgba(245, 158, 11, 0.2);
    border: 1px solid rgba(245, 158, 11, 0.5);
    color: #fde68a;
    padding: var(--spacing-md);
    border-radius: 0.75rem;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    font-size: 0.9rem;
}

/* Admin */
.add-item-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    text-align: center;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: bold;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.item-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.item-list.scrollable {
    max-height: 400px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.item-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.05);
    padding: var(--spacing-sm);
    border-radius: 0.5rem;
    min-height: var(--touch-target);
}

.item-thumb {
    width: 40px;
    height: 40px;
    border-radius: 0.375rem;
    object-fit: cover;
    flex-shrink: 0;
}

.item-thumb.placeholder {
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-dim);
}

.item-info {
    flex: 1;
    min-width: 0;
}

.item-info .item-name {
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 0.95rem;
}

.item-info .item-category {
    font-size: 0.7rem;
    color: var(--text-dim);
}

.item-matchups {
    font-size: 0.8rem;
    color: var(--text-muted);
    flex-shrink: 0;
}

.item-matchups.warning {
    color: var(--warning);
}

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    z-index: 50;
}

.modal-content {
    background: var(--bg-dark);
    border-radius: 1rem;
    padding: var(--spacing-lg);
    width: 100%;
    max-width: 400px;
    border: 1px solid var(--card-border);
    max-height: 90vh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.modal-content h3 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-md);
}

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

.modal-buttons .btn {
    flex: 1;
}

.image-preview {
    margin-top: var(--spacing-sm);
}

.image-preview img {
    width: 100%;
    height: 120px;
    object-fit: cover;
    border-radius: 0.5rem;
}

/* History Table */
.filter-form {
    margin-bottom: var(--spacing-md);
}

.filter-form select {
    max-width: 200px;
}

.filter-count {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.data-table th,
.data-table td {
    padding: var(--spacing-sm);
    text-align: left;
    border-bottom: 1px solid var(--card-border);
}

.data-table th {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.8rem;
}

.data-table .winner {
    color: var(--success);
}

.data-table .loser {
    color: var(--error);
}

.data-table .date {
    color: var(--text-dim);
    font-size: 0.75rem;
    white-space: nowrap;
}

.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.page-info {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Loading */
.loading {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
}

.error {
    text-align: center;
    padding: 2rem;
    color: var(--error);
}

/* Login */
.login-container {
    min-height: 100vh;
    min-height: -webkit-fill-available;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    padding-top: calc(var(--spacing-md) + env(safe-area-inset-top));
    padding-bottom: calc(var(--spacing-md) + env(safe-area-inset-bottom));
}

.login-box {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 1.5rem;
    padding: var(--spacing-lg);
    width: 100%;
    max-width: 400px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.login-title {
    font-size: 1.75rem;
    font-weight: bold;
    text-align: center;
    margin-bottom: var(--spacing-xs);
}

.login-subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
    font-size: 0.9rem;
}

.user-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.user-btn {
    padding: var(--spacing-md);
    min-height: 60px;
    border-radius: 0.75rem;
    border: 2px solid transparent;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
    -webkit-user-select: none;
    user-select: none;
}

.user-btn:active {
    transform: scale(0.98);
}

.user-btn.selected {
    background: white;
    color: var(--primary);
    border-color: white;
}

.user-btn .name {
    font-weight: 600;
    font-size: 1.1rem;
}

.user-btn .badge {
    font-size: 0.65rem;
    opacity: 0.7;
}

.pin-input {
    width: 100%;
    padding: var(--spacing-md);
    min-height: 56px;
    font-size: 1.5rem;
    text-align: center;
    letter-spacing: 0.5rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 0.75rem;
    color: white;
    margin-bottom: var(--spacing-md);
}

.pin-input::placeholder {
    color: rgba(255, 255, 255, 0.5);
    letter-spacing: normal;
}

.pin-input:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.5);
}

.login-btn {
    width: 100%;
    padding: var(--spacing-md);
    min-height: 52px;
    font-size: 1.1rem;
    font-weight: 600;
    background: white;
    color: var(--primary);
    border: none;
    border-radius: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
}

.login-btn:active {
    transform: scale(0.98);
}

.error-message {
    background: rgba(239, 68, 68, 0.2);
    border: 1px solid rgba(239, 68, 68, 0.5);
    color: #fca5a5;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 0.5rem;
    text-align: center;
    margin-bottom: var(--spacing-md);
}

/* Utilities */
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }

/* iPad Landscape */
@media (min-width: 768px) {
    .matchup-container {
        flex-direction: row;
        justify-content: center;
        gap: var(--spacing-lg);
    }
    
    .choice-btn {
        max-width: 350px;
    }
    
    .choice-btn:hover {
        transform: scale(1.02);
        background: rgba(255, 255, 255, 0.15);
    }
    
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Large screens */
@media (min-width: 1024px) {
    .choice-name {
        font-size: 1.6rem;
    }
}