/* =========================================
   BrightStar Ambassador Platform - Styles
   ========================================= */

:root {
    --theme-color: #0066CC;
    --accent-color: #FF6B35;
    --bg: #F5F6FA;
    --card-bg: #FFFFFF;
    --text: #1a1a2e;
    --text-muted: #6B7280;
    --border: #E5E7EB;
    --radius: 12px;
    --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

.page-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
.site-header {
    background: white;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}
.header-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 14px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}
.logo-img { height: 32px; }
.header-link {
    font-size: 14px;
    font-weight: 600;
    color: var(--theme-color);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 8px;
    transition: background 0.2s;
}
.header-link:hover { background: rgba(0,102,204,0.06); }

/* Hero */
.hero {
    background: linear-gradient(135deg, var(--theme-color), color-mix(in srgb, var(--theme-color) 70%, black));
    color: white;
    padding: 48px 24px 40px;
}
.hero-inner {
    max-width: 1100px;
    margin: 0 auto;
    text-align: center;
}
.campaign-badge {
    display: inline-block;
    background: rgba(255,255,255,0.18);
    padding: 6px 18px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin-bottom: 16px;
}
.hero h1 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 12px;
}
.hero-tagline {
    font-size: 17px;
    opacity: 0.92;
    max-width: 600px;
    margin: 0 auto 8px;
}
.hero-description {
    font-size: 15px;
    opacity: 0.8;
    margin-bottom: 20px;
}
.hero-meta {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
    font-size: 14px;
    opacity: 0.9;
}

/* Container & Grid */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 32px 24px;
    flex: 1;
}
.main-grid {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 32px;
    align-items: start;
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}
.section-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}
.section-number {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--theme-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 15px;
    flex-shrink: 0;
}
.section-header h2 {
    font-size: 18px;
    font-weight: 700;
}
.section-sub {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 2px;
}

/* Form Elements */
.form-group {
    margin-bottom: 20px;
}
.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text);
}
.req { color: #E53E3E; }
.hint { color: var(--text-muted); font-weight: 400; font-size: 13px; }

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
textarea,
select {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--border);
    border-radius: 8px;
    font-family: inherit;
    font-size: 14px;
    transition: border-color 0.2s, box-shadow 0.2s;
    background: white;
}
input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--theme-color);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--theme-color) 12%, transparent);
}
textarea { resize: vertical; }
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

/* Activity Options */
.activity-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}
.activity-option input[type="radio"] { display: none; }
.activity-card {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 16px;
    border: 2px solid var(--border);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s;
}
.activity-option input:checked + .activity-card {
    border-color: var(--theme-color);
    background: color-mix(in srgb, var(--theme-color) 4%, white);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--theme-color) 12%, transparent);
}
.activity-card:hover {
    border-color: color-mix(in srgb, var(--theme-color) 50%, var(--border));
}
.activity-emoji { font-size: 22px; }
.activity-name { font-size: 13px; font-weight: 600; flex: 1; }
.activity-points {
    font-size: 12px;
    font-weight: 700;
    color: var(--theme-color);
    background: color-mix(in srgb, var(--theme-color) 8%, white);
    padding: 3px 8px;
    border-radius: 20px;
}

/* File Upload */
.file-upload {
    position: relative;
    border: 2px dashed var(--border);
    border-radius: 10px;
    overflow: hidden;
    transition: border-color 0.2s;
}
.file-upload.dragover { border-color: var(--theme-color); background: color-mix(in srgb, var(--theme-color) 3%, white); }
.file-upload input[type="file"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
    z-index: 2;
}
.file-upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 32px 20px;
    text-align: center;
}
.upload-icon { font-size: 32px; margin-bottom: 8px; }
.file-upload-content p { font-size: 14px; color: var(--text-muted); }
.file-upload-content strong { color: var(--theme-color); }
.file-hint { font-size: 12px !important; margin-top: 4px; }
.file-preview {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
}
.file-preview img {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 8px;
    border: 1px solid var(--border);
}
.remove-file {
    background: #FEE2E2;
    color: #DC2626;
    border: none;
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    z-index: 3;
    position: relative;
}

/* Checkbox */
.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    cursor: pointer;
    font-size: 14px;
    line-height: 1.5;
    margin-bottom: 24px;
}
.checkbox-label input[type="checkbox"] {
    margin-top: 3px;
    width: 18px;
    height: 18px;
    accent-color: var(--theme-color);
}

/* Submit Button */
.btn-submit {
    width: 100%;
    padding: 14px 24px;
    background: var(--theme-color);
    color: white;
    border: none;
    border-radius: 10px;
    font-family: inherit;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.1s, box-shadow 0.2s;
    box-shadow: 0 2px 8px color-mix(in srgb, var(--theme-color) 30%, transparent);
}
.btn-submit:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px color-mix(in srgb, var(--theme-color) 40%, transparent);
}
.btn-submit:active { transform: translateY(0); }

/* Alerts */
.alert {
    padding: 14px 18px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 20px;
}
.alert-error { background: #FEE2E2; color: #991B1B; border: 1px solid #FECACA; }
.alert-success { background: #D1FAE5; color: #065F46; border: 1px solid #A7F3D0; }

/* Sidebar */
.sidebar-card { padding: 22px; }
.sidebar-card h3 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 16px;
}
.empty-state { font-size: 13px; color: var(--text-muted); text-align: center; padding: 20px 0; }
.sidebar-link {
    display: block;
    text-align: center;
    font-size: 13px;
    font-weight: 600;
    color: var(--theme-color);
    text-decoration: none;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

/* Mini Leaderboard */
.mini-leaderboard { display: flex; flex-direction: column; gap: 10px; }
.lb-row {
    display: flex;
    align-items: center;
    gap: 12px;
}
.lb-rank {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    color: var(--text-muted);
    flex-shrink: 0;
}
.lb-info { flex: 1; min-width: 0; }
.lb-name { font-size: 13px; font-weight: 600; display: block; }
.lb-dept { font-size: 11px; color: var(--text-muted); }
.lb-points { text-align: right; }
.lb-points strong { font-size: 16px; color: var(--theme-color); display: block; }
.lb-points span { font-size: 11px; color: var(--text-muted); }

/* Points Guide */
.points-guide { display: flex; flex-direction: column; gap: 8px; }
.guide-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    padding: 6px 0;
}
.guide-points {
    font-weight: 700;
    color: var(--theme-color);
    background: color-mix(in srgb, var(--theme-color) 8%, white);
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 12px;
}
.goal-banner {
    margin-top: 16px;
    padding: 12px 16px;
    background: color-mix(in srgb, var(--accent-color) 8%, white);
    border-radius: 8px;
    font-size: 13px;
    text-align: center;
    border: 1px solid color-mix(in srgb, var(--accent-color) 20%, white);
}

/* How It Works */
.how-it-works { display: flex; flex-direction: column; gap: 12px; }
.step {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 13px;
}
.step-num {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--theme-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}

/* Leaderboard Page */
.leaderboard-header {
    margin-bottom: 24px;
}
.leaderboard-header h1 {
    font-size: 28px;
    margin-bottom: 16px;
}
.campaign-filter {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.filter-btn {
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    color: var(--text-muted);
    background: white;
    border: 1px solid var(--border);
    transition: all 0.2s;
}
.filter-btn.active, .filter-btn:hover {
    color: var(--theme-color);
    border-color: var(--theme-color);
    background: color-mix(in srgb, var(--theme-color) 4%, white);
}
.campaign-info-bar {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    padding: 12px 0 16px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 16px;
    font-size: 14px;
    font-weight: 500;
}
.leaderboard-table {
    width: 100%;
    border-collapse: collapse;
}
.leaderboard-table th {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    text-align: left;
}
.leaderboard-table td {
    padding: 14px 12px;
    border-bottom: 1px solid #F3F4F6;
    font-size: 14px;
}
.leaderboard-table tr.top-three td { background: color-mix(in srgb, var(--theme-color) 2%, white); }
.points-display { color: var(--theme-color); font-size: 18px; }
.goal-reached { margin-left: 4px; }
.pending-badge {
    background: #FEF3C7;
    color: #92400E;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 12px;
    font-weight: 600;
}

/* Footer */
.site-footer {
    text-align: center;
    padding: 24px;
    font-size: 13px;
    color: var(--text-muted);
    border-top: 1px solid var(--border);
    margin-top: auto;
}

/* Responsive */
@media (max-width: 768px) {
    .main-grid { grid-template-columns: 1fr; }
    .hero h1 { font-size: 26px; }
    .hero-meta { flex-direction: column; gap: 8px; }
    .activity-options { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .card { padding: 22px 18px; }
}