/* ========== CSS Variables ========== */
:root {
    --bg-gradient: linear-gradient(135deg, #f0f4f8 0%, #e8f0fe 50%, #f0f4f8 100%);
    --bg-color: #f0f4f8;
    --card-bg: #ffffff;
    --card-border: #e2e8f0;
    --card-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-muted: #a0aec0;
    --input-bg: #ffffff;
    --input-border: #e2e8f0;
    --input-focus: #0066cc;
    --badge-bg: #ebf4ff;
    --badge-text: #0066cc;
    --tab-active-bg: #1a202c;
    --tab-active-text: #ffffff;
    --tab-inactive-bg: #f7fafc;
    --tab-inactive-text: #4a5568;
    --btn-primary: #0066cc;
    --btn-primary-hover: #0052a3;
    --btn-success: #00a86b;
    --btn-success-hover: #008f5a;
    --btn-outline-border: #0066cc;
    --btn-outline-text: #0066cc;
    --btn-outline-hover: #ebf4ff;
    --info-card-bg: #ffffff;
    --info-card-border: #e2e8f0;
    --result-success-border: #00a86b;
    --result-failed-border: #e53e3e;
    --toast-bg: #1a202c;
    --toast-text: #ffffff;
    --stat-bg: #f7fafc;
    --stat-border: #e2e8f0;
    --theme-icon: '';
}

[data-theme="dark"] {
    --bg-gradient: linear-gradient(135deg, #0f1923 0%, #1a2332 50%, #0f1923 100%);
    --bg-color: #0f1923;
    --card-bg: #1e2d3d;
    --card-border: #2d3e50;
    --card-shadow: 0 1px 3px rgba(0,0,0,0.3);
    --text-primary: #e2e8f0;
    --text-secondary: #a0aec0;
    --text-muted: #718096;
    --input-bg: #162032;
    --input-border: #2d3e50;
    --input-focus: #4fc3f7;
    --badge-bg: #1a365d;
    --badge-text: #4fc3f7;
    --tab-active-bg: #4fc3f7;
    --tab-active-text: #0f1923;
    --tab-inactive-bg: #1e2d3d;
    --tab-inactive-text: #a0aec0;
    --btn-primary: #4fc3f7;
    --btn-primary-hover: #29b6f6;
    --btn-success: #66bb6a;
    --btn-success-hover: #4caf50;
    --btn-outline-border: #4fc3f7;
    --btn-outline-text: #4fc3f7;
    --btn-outline-hover: rgba(79,195,247,0.1);
    --info-card-bg: #1e2d3d;
    --info-card-border: #2d3e50;
    --result-success-border: #66bb6a;
    --result-failed-border: #ef5350;
    --toast-bg: #1e2d3d;
    --toast-text: #e2e8f0;
    --stat-bg: #162032;
    --stat-border: #2d3e50;
    --theme-icon: '☀️';
}

/* ========== Reset & Base ========== */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    background: var(--bg-gradient);
    color: var(--text-primary);
    min-height: 100vh;
    transition: background 0.3s, color 0.3s;
}
.hidden { display: none !important; }
.page { min-height: 100vh; }

/* ========== Login ========== */
#login-page {
    display: flex; align-items: center; justify-content: center;
    padding: 20px;
}
.login-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 48px 40px;
    width: 100%; max-width: 420px;
    text-align: center;
    box-shadow: var(--card-shadow);
    transition: background 0.3s, border-color 0.3s;
}
.login-badge {
    display: inline-block;
    background: var(--badge-bg);
    color: var(--badge-text);
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 20px;
}
.login-card h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}
.login-desc {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 28px;
}
.error-msg { color: #e53e3e; margin-top: 12px; min-height: 20px; font-size: 13px; }

/* ========== Container ========== */
.container {
    max-width: 640px;
    margin: 0 auto;
    padding: 40px 20px 60px;
}

/* ========== Top Bar ========== */
.top-bar {
    text-align: center;
    margin-bottom: 24px;
    position: relative;
}
.top-bar-title { display: inline-block; }
.badge {
    display: inline-block;
    background: var(--badge-bg);
    color: var(--badge-text);
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 12px;
}
.top-bar h1 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
}
.subtitle {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.5;
}
.theme-btn {
    position: absolute;
    top: 0; right: 0;
    width: 40px; height: 40px;
    border-radius: 50%;
    border: 1px solid var(--card-border);
    background: var(--card-bg);
    cursor: pointer;
    font-size: 18px;
    display: flex; align-items: center; justify-content: center;
    transition: all 0.2s;
    line-height: 1;
}
.theme-btn:hover { transform: scale(1.1); }

/* ========== Info Card ========== */
.info-card {
    background: var(--info-card-bg);
    border: 1px solid var(--info-card-border);
    border-radius: 12px;
    padding: 16px 20px;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.6;
    transition: background 0.3s, border-color 0.3s;
}
.info-card code {
    background: var(--badge-bg);
    color: var(--badge-text);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 13px;
}

/* ========== Tab Bar ========== */
.tab-bar {
    display: flex;
    background: var(--tab-inactive-bg);
    border-radius: 12px;
    padding: 4px;
    margin-bottom: 20px;
    border: 1px solid var(--card-border);
    transition: background 0.3s, border-color 0.3s;
}
.tab-btn {
    flex: 1;
    padding: 10px 16px;
    border: none;
    border-radius: 10px;
    background: transparent;
    color: var(--tab-inactive-text);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}
.tab-btn.active {
    background: var(--tab-active-bg);
    color: var(--tab-active-text);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
.tab-btn:hover:not(.active) { color: var(--text-primary); }

/* ========== Tab Content ========== */
.tab-content { display: none; }
.tab-content.active { display: block; }

/* ========== Card ========== */
.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 24px;
    box-shadow: var(--card-shadow);
    transition: background 0.3s, border-color 0.3s;
}
.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}
.card-header h2 {
    font-size: 18px;
    font-weight: 600;
}
.card-header-actions {
    display: flex;
    gap: 8px;
}

/* ========== Forms ========== */
.form-group { margin-bottom: 16px; }
.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}
input[type="text"], input[type="password"], textarea {
    width: 100%;
    padding: 10px 14px;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s, background 0.3s;
}
input:focus, textarea:focus { border-color: var(--input-focus); }
textarea {
    resize: vertical;
    font-family: 'Consolas', 'Courier New', monospace;
    line-height: 1.6;
}
.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 8px;
}

/* ========== Buttons ========== */
.btn {
    padding: 10px 24px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s;
}
.btn-primary { background: var(--btn-primary); color: #fff; }
.btn-primary:hover { background: var(--btn-primary-hover); }
.btn-success { background: var(--btn-success); color: #fff; }
.btn-success:hover { background: var(--btn-success-hover); }
.btn-outline {
    background: transparent;
    border: 1px solid var(--btn-outline-border);
    color: var(--btn-outline-text);
}
.btn-outline:hover { background: var(--btn-outline-hover); }
.btn-danger {
    border-color: #e53e3e;
    color: #e53e3e;
}
.btn-danger:hover { background: rgba(229,62,62,0.1); }
.btn-block { width: 100%; padding: 12px; font-size: 15px; }
.btn-sm { padding: 6px 14px; font-size: 12px; border-radius: 8px; }
.btn-text {
    background: none; border: none;
    color: var(--text-muted);
    cursor: pointer; font-size: 13px;
    padding: 8px;
}
.btn-text:hover { color: var(--text-primary); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ========== Count Badge ========== */
.count-badge {
    background: var(--badge-bg);
    color: var(--badge-text);
    padding: 2px 12px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
}

/* ========== Results ========== */
.results-summary {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 8px;
}
.results-time {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 12px;
}
.results-time.expired {
    color: #e53e3e;
}
.results-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 16px;
}
.result-stat {
    background: var(--stat-bg);
    border: 1px solid var(--stat-border);
    border-radius: 10px;
    padding: 16px;
    text-align: center;
    transition: background 0.3s, border-color 0.3s;
}
.stat-label {
    display: block;
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 4px;
}
.stat-value {
    display: block;
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
}
.results-list {
    margin-top: 8px;
    max-height: 400px;
    overflow-y: auto;
    padding-right: 4px;
}
.results-list::-webkit-scrollbar { width: 6px; }
.results-list::-webkit-scrollbar-track { background: transparent; }
.results-list::-webkit-scrollbar-thumb { background: var(--card-border); border-radius: 3px; }
.results-list::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }
.result-item {
    background: var(--stat-bg);
    border: 1px solid var(--stat-border);
    border-radius: 10px;
    padding: 14px 16px;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: background 0.3s, border-color 0.3s;
}
.result-item.success { border-left: 3px solid var(--result-success-border); }
.result-item.failed { border-left: 3px solid var(--result-failed-border); }
.result-icon { font-size: 16px; flex-shrink: 0; }
.result-info { flex: 1; min-width: 0; }
.result-email { font-weight: 600; font-size: 14px; margin-bottom: 2px; }
.result-wlid {
    font-family: monospace;
    font-size: 12px;
    color: var(--text-muted);
    word-break: break-all;
    white-space: pre-wrap;
}
.result-error { color: #e53e3e; font-size: 13px; }
.result-copy { flex-shrink: 0; }

/* ========== Log Area ========== */
.log-card { margin-top: 16px; }
.log-progress {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 500;
}
.log-area {
    max-height: 300px;
    overflow-y: auto;
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 12px;
    line-height: 1.8;
    padding: 12px;
    background: var(--stat-bg);
    border: 1px solid var(--stat-border);
    border-radius: 8px;
}
.log-area::-webkit-scrollbar { width: 6px; }
.log-area::-webkit-scrollbar-track { background: transparent; }
.log-area::-webkit-scrollbar-thumb { background: var(--card-border); border-radius: 3px; }
.log-line { padding: 2px 0; }
.log-line.success { color: var(--result-success-border); }
.log-line.error { color: var(--result-failed-border); }
.log-line.info { color: var(--text-muted); }

/* ========== Footer ========== */
.footer-bar {
    text-align: center;
    margin-top: 32px;
    padding-top: 20px;
    border-top: 1px solid var(--card-border);
}

/* ========== Toast ========== */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--toast-bg);
    color: var(--toast-text);
    padding: 12px 24px;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    font-size: 14px;
    z-index: 1000;
    transition: opacity 0.3s;
}
.toast.success { border-left: 3px solid var(--result-success-border); }
.toast.error { border-left: 3px solid var(--result-failed-border); }
.toast.hidden { opacity: 0; pointer-events: none; }

/* ========== Responsive ========== */
@media (max-width: 480px) {
    .container { padding: 24px 16px 48px; }
    .top-bar h1 { font-size: 24px; }
    .theme-btn { top: 8px; right: 8px; }
    .form-actions { flex-direction: column; }
    .results-grid { grid-template-columns: repeat(3, 1fr); gap: 8px; }
    .result-stat { padding: 12px 8px; }
    .stat-value { font-size: 20px; }
}