/* ===================================
   ReURL Stylesheet (Light Frost Theme)
   Follows System Specification: Pure SVG, Glassmorphism, Responsive
   =================================== */

:root {
    --color-primary: #3B82F6;
    --color-primary-light: #60A5FA;
    --color-secondary: #8B5CF6;
    --color-success: #10B981;
    --color-warning: #F59E0B;
    --color-danger: #EF4444;
    --color-info: #3B82F6;
    --color-bg: #F8FAFC;
    --color-text: #1E293B;
    --color-text-muted: #475569;
    --color-border: #E2E8F0;

    --glass-bg: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(255, 255, 255, 0.4);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.12);

    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans TC', sans-serif;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    --radius-sm: 0.5rem;
    --radius-md: 0.875rem;
    --radius-lg: 1.25rem;
    --radius-full: 9999px;

    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* Background animated gradient */
.bg-gradient {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: linear-gradient(135deg,
            #667eea 0%,
            #764ba2 25%,
            #f093fb 50%,
            #4facfe 75%,
            #00f2fe 100%);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    opacity: 0.12;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md);
    min-height: calc(100vh - 100px);
}

/* ===================================
   Floating Navbar (Shared Standard)
   =================================== */
.navbar {
    position: relative;
    width: 100%;
    margin-bottom: var(--spacing-xl);
    z-index: 10;
    animation: slideDown 0.6s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.nav-icon {
    width: 32px;
    height: 32px;
    color: var(--color-primary);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.nav-title {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 8px !important;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all var(--transition-normal);
    cursor: pointer;
}

.nav-links .nav-link-icon {
    padding: 6px 8px !important;
}

.nav-link:hover {
    background: rgba(59, 130, 246, 0.1);
    color: var(--color-primary);
    transform: translateY(-2px);
}

.link-icon {
    width: 20px;
    height: 20px;
}

/* Language Switcher */
.lang-selector,
.lang-switcher {
    display: flex;
    gap: 0;
    padding: 3px;
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
}

.lang-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 30px;
    padding: 5px 12px;
    background: transparent;
    border: none;
    border-radius: calc(var(--radius-sm) - 2px);
    color: var(--color-text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    line-height: 1;
    text-decoration: none;
}

.lang-btn:hover {
    color: var(--color-text);
}

.lang-btn.active {
    background: #fff;
    color: var(--color-primary);
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.08);
}

.lang-btn.active:hover {
    background: #fff;
    color: var(--color-primary);
}

/* Hero Section */
.hero-section {
    text-align: center;
    margin: var(--spacing-xl) 0 var(--spacing-lg);
    animation: fadeIn 0.8s ease-out;
}

.hero-title {
    font-size: 2.25rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.hero-subtitle {
    font-size: 1.05rem;
    color: var(--color-text-muted);
    max-width: 720px;
    margin: 0 auto;
    line-height: 1.65;
}

/* Glass Card */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

/* Input Form Card */
.input-card {
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.input-group label {
    font-weight: 600;
    color: var(--color-text);
    font-size: 1rem;
}

.input-wrapper {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.input-wrapper input[type="url"] {
    flex: 1;
    min-width: 0;
    height: 48px;
    padding: 0 1.1rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: var(--font-family);
    transition: all var(--transition-normal);
    background: white;
    outline: none;
    box-sizing: border-box;
}

.input-wrapper input[type="url"]:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.turnstile-box {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.submit-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    height: 48px;
    padding: 0 1.6rem;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    white-space: nowrap;
    box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
    flex-shrink: 0;
    box-sizing: border-box;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(59, 130, 246, 0.4);
}

.submit-btn:active {
    transform: translateY(0);
}

.submit-btn:disabled {
    opacity: 0.65;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

/* Loading Spinner */
.loading-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) 0;
    animation: fadeIn 0.4s ease-out;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.9s linear infinite;
}

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

.loading-text {
    margin-top: var(--spacing-sm);
    color: var(--color-text-muted);
    font-size: 1rem;
}

/* Result Area */
.result-area {
    max-width: 900px;
    margin: var(--spacing-lg) auto 0;
    animation: fadeInUp 0.5s ease-out;
}

/* Status Banner / Card Header */
.result-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
    flex-wrap: wrap;
}

.result-card-title-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.result-header-icon {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
}

.result-header-icon.success {
    color: var(--color-success);
}

.result-header-icon.warning {
    color: var(--color-warning);
}

.result-header-icon.danger {
    color: var(--color-danger);
}

.result-card-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
}

.result-score-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 700;
}

.result-score-badge.safe {
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.4);
    color: #047857;
}

.result-score-badge.warning {
    background: rgba(245, 158, 11, 0.15);
    border: 1px solid rgba(245, 158, 11, 0.4);
    color: #b45309;
}

.result-score-badge.danger {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.4);
    color: #b91c1c;
}

/* Result Rows */
.result-rows {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.result-row {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.result-row-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-muted);
}

.result-row-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.result-short-url-link {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--color-primary);
    text-decoration: none;
    word-break: break-all;
    letter-spacing: -0.01em;
}

.result-short-url-link:hover {
    text-decoration: underline;
}

.result-original-url-text {
    font-size: 0.95rem;
    color: var(--color-text);
    word-break: break-all;
    max-height: 4em;
    overflow-y: auto;
}

.result-code-tag {
    font-family: monospace;
    font-size: 1.1rem;
    font-weight: 700;
    background: rgba(148, 163, 184, 0.18);
    padding: 3px 10px;
    border-radius: var(--radius-sm);
    color: var(--color-text);
}

/* Action Button Group */
.result-actions {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
    margin-top: var(--spacing-xs);
}

.btn-action-primary {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-action-primary:hover {
    background: #2563EB;
    transform: translateY(-1px);
}

.btn-action-secondary {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: rgba(148, 163, 184, 0.15);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-action-secondary:hover {
    background: rgba(148, 163, 184, 0.25);
    transform: translateY(-1px);
}

/* Alert Notices */
.result-notice {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.92rem;
    line-height: 1.6;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.result-notice.warning {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: #92400e;
}

.result-notice.info {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.3);
    color: #1e40af;
}

.notice-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    margin-top: 2px;
}

/* Error Card */
.error-card {
    border-color: rgba(239, 68, 68, 0.3);
    background: rgba(239, 68, 68, 0.05);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    max-width: 900px;
    margin: var(--spacing-md) auto;
}

.error-card-icon {
    width: 28px;
    height: 28px;
    color: var(--color-danger);
    flex-shrink: 0;
}

.error-card-text {
    font-size: 0.95rem;
    color: #991b1b;
    font-weight: 500;
}

/* Security Assessment Section inside Result Card */
.security-summary-card {
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.security-summary-card.safe {
    background: rgba(16, 185, 129, 0.06);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.security-summary-card.warning {
    background: rgba(245, 158, 11, 0.06);
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.security-summary-card.danger {
    background: rgba(239, 68, 68, 0.06);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.security-indicators-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 10px;
}

.security-indicator-pill {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.security-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.security-dot.danger { background-color: var(--color-danger); }
.security-dot.warning { background-color: var(--color-warning); }
.security-dot.safe { background-color: var(--color-success); }

/* QR Modal */
.qr-modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 9000;
    background: rgba(15, 23, 42, 0.65);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease-out;
}

.qr-modal-overlay.active {
    display: flex;
}

.qr-modal-box {
    background: var(--glass-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: 0 24px 64px rgba(31, 38, 135, 0.3);
    width: 340px;
    max-width: calc(100vw - 2rem);
    overflow: hidden;
}

.qr-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem 0;
}

.qr-modal-title {
    font-size: 1.1rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.qr-modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(148, 163, 184, 0.15);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    color: var(--color-text-muted);
}

.qr-modal-close:hover {
    background: rgba(239, 68, 68, 0.1);
    color: var(--color-danger);
}

.qr-modal-body {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.qr-img-wrapper {
    width: 220px;
    height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    border-radius: var(--radius-md);
    padding: 12px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}

.qr-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.qr-url-label {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    text-align: center;
    word-break: break-all;
    max-height: 3em;
    overflow: hidden;
}

.qr-modal-footer {
    display: flex;
    gap: 0.75rem;
    padding: 0 1.5rem 1.5rem;
}

.qr-download-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.65rem 1rem;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
}

.qr-close-btn {
    padding: 0.65rem 1rem;
    background: rgba(148, 163, 184, 0.15);
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    cursor: pointer;
}

/* Info Features Section */
.info-section {
    max-width: 900px;
    margin: var(--spacing-xl) auto var(--spacing-lg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.feature-box {
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.feature-box-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-primary);
}

.feature-box-desc {
    font-size: 0.88rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-container {
        padding: var(--spacing-sm);
    }

    .nav-container {
        max-width: 100%;
        padding: var(--spacing-sm) var(--spacing-xs);
        box-sizing: border-box;
        overflow: hidden;
    }

    .nav-links {
        gap: var(--spacing-xs);
        flex-shrink: 0;
    }

    .nav-brand {
        gap: var(--spacing-xs);
        padding-left: 10px;
        min-width: 0;
        overflow: hidden;
    }

    .nav-title {
        font-size: 1.25rem;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .nav-link span {
        display: none;
    }

    .lang-btn span {
        display: inline-block;
        font-size: 0.75rem;
    }

    .lang-btn {
        padding: 4px 8px;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .input-wrapper {
        flex-direction: column;
        align-items: stretch;
        width: 100%;
    }

    .input-wrapper input[type="url"] {
        width: 100%;
        height: 48px;
        min-height: 48px;
        flex: none;
        box-sizing: border-box;
    }

    .turnstile-box {
        width: 100%;
        display: flex;
        justify-content: center;
        margin: 4px 0;
    }

    .submit-btn {
        width: 100%;
        height: 48px;
        min-height: 48px;
        justify-content: center;
        box-sizing: border-box;
    }

    .result-short-url-link {
        font-size: 1.15rem;
    }
}

@media (max-width: 480px) {
    .main-container {
        padding: var(--spacing-xs);
    }

    /* Navbar two column / row layout */
    .nav-container {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
        padding: var(--spacing-sm);
    }

    .nav-brand {
        width: 100%;
        padding-left: 10px;
    }

    .nav-links {
        width: 100%;
        justify-content: flex-end;
        gap: var(--spacing-sm);
    }

    .nav-title {
        white-space: nowrap;
        font-size: 1.25rem;
    }

    .nav-link {
        padding: 6px 10px;
        background: rgba(59, 130, 246, 0.05);
    }

    .nav-link span {
        display: none;
    }

    .lang-selector,
    .lang-switcher {
        margin-left: 0;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .glass-card {
        padding: var(--spacing-sm);
    }
}