/* SimpleMem - Simple White Style */

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

:root {
    --color-bg: #ffffff;
    --color-text: #1a1a1a;
    --color-text-secondary: #666666;
    --color-border: #e0e0e0;
    --color-border-hover: #1a1a1a;
    --color-accent: #1a1a1a;
    --color-accent-hover: #333333;
    --color-error: #dc3545;
    --color-success: #28a745;
    --color-code-bg: #f5f5f5;

    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;

    --radius: 8px;
    --radius-sm: 4px;

    --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.1);

    --transition: 0.2s ease;
}

html {
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 48px 24px;
    line-height: 1.6;
}

.container {
    width: 100%;
    max-width: 520px;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 48px;
}

header h1 {
    font-size: 28px;
    font-weight: 600;
    letter-spacing: -0.5px;
    margin-bottom: 8px;
}

header .subtitle {
    font-size: 14px;
    color: var(--color-text-secondary);
}

/* Card */
.card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 32px;
    margin-bottom: 24px;
    box-shadow: var(--shadow);
}

.card h2 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.card h3 {
    font-size: 14px;
    font-weight: 600;
    margin-top: 24px;
    margin-bottom: 8px;
}

.card .description {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}

.card.error {
    border-color: var(--color-error);
}

.card.error h2 {
    color: var(--color-error);
}

/* Form */
form {
    margin-bottom: 16px;
}

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: 8px;
}

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: var(--font-mono);
    background: var(--color-bg);
    color: var(--color-text);
    transition: border-color var(--transition), box-shadow var(--transition);
}

input[type="text"]:focus,
input[type="password"]:focus {
    outline: none;
    border-color: var(--color-border-hover);
    box-shadow: 0 0 0 3px rgba(26, 26, 26, 0.05);
}

input[type="text"]::placeholder,
input[type="password"]::placeholder {
    color: #aaa;
}

/* Buttons */
button {
    font-family: var(--font-sans);
    cursor: pointer;
    transition: all var(--transition);
}

button[type="submit"],
.primary-btn {
    width: 100%;
    padding: 14px 24px;
    background: var(--color-accent);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
}

button[type="submit"]:hover,
.primary-btn:hover {
    background: var(--color-accent-hover);
}

button[type="submit"]:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.secondary-btn {
    width: 100%;
    padding: 12px 24px;
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    margin-top: 12px;
}

.secondary-btn:hover {
    border-color: var(--color-border-hover);
    background: var(--color-code-bg);
}

.copy-btn {
    padding: 8px 16px;
    background: var(--color-bg);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 500;
}

.copy-btn:hover {
    border-color: var(--color-border-hover);
    background: var(--color-code-bg);
}

.copy-btn.full-width {
    width: 100%;
    margin-top: 12px;
}

.copy-btn.copied {
    background: var(--color-success);
    color: #fff;
    border-color: var(--color-success);
}

/* Loading State */
.btn-text,
.btn-loading {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.spinner {
    width: 16px;
    height: 16px;
    border: 2px solid #fff;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-right: 8px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Result Items */
.result-item {
    margin-bottom: 20px;
}

.result-item label {
    display: block;
    font-size: 12px;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.result-value {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--color-text);
    background: var(--color-code-bg);
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    word-break: break-all;
    margin-bottom: 8px;
    border: 1px solid var(--color-border);
}

/* Config Section */
.config-section {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}

pre {
    font-family: var(--font-mono);
    font-size: 12px;
    background: var(--color-code-bg);
    padding: 16px;
    border-radius: var(--radius-sm);
    overflow-x: auto;
    border: 1px solid var(--color-border);
    white-space: pre-wrap;
    word-break: break-all;
}

/* Note */
.note {
    font-size: 12px;
    color: var(--color-text-secondary);
    margin-top: 16px;
    padding: 12px;
    background: var(--color-code-bg);
    border-radius: var(--radius-sm);
}

/* Input Hint */
.input-hint {
    font-size: 12px;
    color: var(--color-text-secondary);
    margin-top: 8px;
}

.input-hint a {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
}

.input-hint a:hover {
    text-decoration: underline;
}

/* Warning Box */
.warning-box {
    background: #fff8e6;
    border: 1px solid #ffc107;
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    margin-bottom: 24px;
    font-size: 13px;
    color: #856404;
}

.warning-box strong {
    color: #856404;
}

/* Footer */
footer {
    text-align: center;
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}

footer p {
    font-size: 13px;
    color: var(--color-text-secondary);
}

footer a {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
}

footer a:hover {
    text-decoration: underline;
}

footer .version {
    font-size: 11px;
    margin-top: 4px;
}

/* Responsive */
@media (max-width: 480px) {
    body {
        padding: 24px 16px;
    }

    .card {
        padding: 24px;
    }

    header h1 {
        font-size: 24px;
    }
}

/* Animation */
.fade-in {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}