:root {
    --primary-color: #005cac;
    --secondary-color: #009b64;
    --background-color: #f2f2f7;
    --card-background: #ffffff;
    --text-color: #1c1c1e;
    --text-secondary: #8e8e93;
    --border-radius: 12px;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    --ios-blue: #007aff;
}

body {
    background-color: var(--background-color);
    color: var(--text-color);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.5;
    margin: 0;
    padding-bottom: calc(90px + env(safe-area-inset-bottom)); /* Updated for Home Indicator */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
}

/* iOS Style Header */
header.ios-header {
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 15px 20px;
    border-bottom: 0.5px solid #d1d1d6;
    display: flex;
    justify-content: center;
    align-items: center;
    will-change: background-color;
}

header.ios-header h1 {
    font-size: 18px;
    margin: 0;
    font-weight: 600;
}

/* Cards */
article {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: var(--shadow);
    border: none !important;
}

/* Buttons */
button, .button {
    background-color: var(--primary-color) !important;
    border: none !important;
    border-radius: 12px !important;
    color: white !important;
    padding: 14px 20px !important;
    font-weight: 600 !important;
    font-size: 16px !important;
    width: 100%;
    box-sizing: border-box; /* Fix for overflow */
    cursor: pointer;
    transition: transform 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-block;
    text-align: center;
    text-decoration: none;
    will-change: transform;
}

button:active, .button:active {
    transform: scale(0.97);
}

button.secondary, .button.secondary {
    background-color: var(--secondary-color) !important;
}

button.outline, .button.outline {
    background-color: transparent !important;
    border: 1px solid var(--primary-color) !important;
    color: var(--primary-color) !important;
}

/* Form elements */
input, select, textarea {
    border-radius: 10px !important;
    border: 1px solid #d1d1d6 !important;
    padding: 12px !important;
    background-color: #fff !important;
    font-size: 16px !important;
    width: 100%;
    box-sizing: border-box;
    margin-bottom: 15px;
}

input:focus {
    border-color: var(--primary-color) !important;
    outline: none;
}

label {
    display: block;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 5px;
    margin-left: 5px;
}

/* Bottom Navigation (Mobile style) */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 0.5px solid #d1d1d6;
    display: flex;
    justify-content: space-around;
    padding: 12px 0 calc(20px + env(safe-area-inset-bottom)); /* Increased padding for home indicator */
    z-index: 1000;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.05);
    will-change: transform;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 600;
    flex: 1;
    transition: color 0.2s ease;
    will-change: color;
}

.nav-item .nav-icon {
    width: 24px;
    height: 24px;
    margin-bottom: 4px;
    transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform;
}

.nav-item svg {
    width: 100%;
    height: 100%;
}

.nav-item.active {
    color: var(--primary-color);
}

.nav-item.active .nav-icon {
    transform: scale(1.1);
}

/* Table */
.table-container {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

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

th {
    background: #f8f8f8;
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    font-size: 11px;
    padding: 12px;
    text-align: left;
}

td {
    padding: 12px;
    border-top: 0.5px solid #eee;
    font-size: 14px;
}

/* Admin elements */
.admin-badge {
    background: #ffe5e5;
    color: #ff3b30;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: bold;
}

/* Error messages */
.error-msg {
    background-color: #ffe5e5;
    color: #ff3b30;
    padding: 12px;
    border-radius: var(--border-radius);
    margin-bottom: 16px;
    text-align: center;
    font-size: 14px;
}

/* Leaderboard Rank */
.rank-1 { color: #ff9500; font-weight: bold; }
.rank-2 { color: #8e8e93; font-weight: bold; }
.rank-3 { color: #ac8e68; font-weight: bold; }

/* Utilities */
.text-center { text-align: center; }
.mt-20 { margin-top: 20px; }
.mb-20 { margin-bottom: 20px; }
.flex-row { display: flex; align-items: center; justify-content: space-between; }