@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    --primary-color: #007bff;
    --primary-dark: #0056b3;
    --secondary-color: #64748b;
    --background-color: #f8fafc;
    --card-bg: #ffffff;
    --text-color: #1e293b;
    --border-color: #e2e8f0;
    --success-color: #10b981;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 2rem;
}

header h1 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 2rem;
}

.description {
    color: var(--secondary-color);
    font-size: 0.95rem;
}

.description a {
    color: var(--primary-color);
    text-decoration: none;
}

/* Cards */
.card {
    background-color: var(--card-bg);
    border-radius: 8px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.card-header {
    background-color: #f1f5f9;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
}

.card-header h3 {
    font-size: 1.1rem;
    color: var(--text-color);
    margin: 0;
}

.card-body {
    padding: 1.5rem;
    transition: max-height 0.3s ease-out, padding 0.3s ease;
}

.card-body.collapsed {
    display: none;
}

/* Input Area */
.toggle-header {
    padding: 0.75rem 1.5rem;
    background-color: #e2e8f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 500;
    color: #475569;
}

.toggle-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    color: inherit;
    transition: transform 0.3s;
}

.rotated {
    transform: rotate(180deg);
}

.form-group {
    margin-bottom: 1.5rem;
}

.large-textarea {
    width: 100%;
    height: 200px;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-family: monospace;
    font-size: 0.9rem;
    resize: vertical;
}

.large-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Buttons */
.button-group {
    display: flex;
    gap: 1rem;
    flex-direction: row;
    justify-content: space-around;
}

button {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    width: 50%;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
}

.btn-secondary {
    background-color: #e2e8f0;
    color: #475569;
    width: 50%;
}

.btn-secondary:hover {
    background-color: #cbd5e1;
}

button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

/* Tables */
.table-responsive {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

.data-table th,
.data-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    background-color: #f8fafc;
    font-weight: 600;
    color: #475569;
    white-space: nowrap;
}

.data-table tr:last-child td {
    border-bottom: none;
}

/* Alert */
.alert {
    padding: 1rem 1.5rem;
    border-radius: 6px;
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.alert-error {
    background-color: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.hidden {
    display: none;
}

/* Captcha */
.captcha-group {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.captcha-img {
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
}

#captcha {
    width: 120px;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

/* Specific Formatting */
.text-error-bold {
    color: var(--error-color);
    font-weight: 700;
}

.text-info {
    color: #0ea5e9;
}

/* Verification Results */
.verify-pass {
    color: var(--success-color);
    font-weight: 600;
}

.verify-fail {
    color: var(--error-color);
    font-weight: 600;
}

.verify-none {
    color: var(--secondary-color);
    font-style: italic;
}

footer {
    text-align: center;
    color: var(--secondary-color);
    margin-top: 1rem;
}

.route-svg-container {
    width: 100%;
    margin-bottom: 20px;
    background: #fcfcfc;
    border-radius: 8px;
    border: 1px dashed #e0e0e0;
    padding: 20px 0;
    overflow-x: auto;
}