/* ===== CSS Reset & Variables ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* Colors */
    --color-bg: #0a0a0f;
    --color-surface: #12121a;
    --color-surface-hover: #1a1a25;
    --color-border: #2a2a3a;
    --color-text: #e0e0e8;
    --color-text-muted: #8888a0;
    --color-primary: #6366f1;
    --color-primary-hover: #818cf8;
    
    /* Verdict colors */
    --color-safe: #22c55e;
    --color-suspect: #f59e0b;
    --color-dangerous: #ef4444;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Borders */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
}

/* ===== Base Styles ===== */
body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== Container ===== */
.container {
    width: 100%;
    max-width: 640px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== Header ===== */
header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

header h1 .tld {
    color: var(--color-primary);
}

.tagline {
    color: var(--color-text-muted);
    font-size: 1.1rem;
}

/* ===== Form ===== */
.check-form {
    margin-bottom: var(--spacing-xl);
}

.input-group {
    display: flex;
    gap: var(--spacing-sm);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xs);
    transition: border-color var(--transition-fast);
}

.input-group:focus-within {
    border-color: var(--color-primary);
}

#url-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--color-text);
    font-size: 1rem;
    padding: var(--spacing-md);
    outline: none;
    font-family: var(--font-mono);
}

#url-input::placeholder {
    color: var(--color-text-muted);
}

#check-btn {
    background: var(--color-primary);
    color: white;
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition-fast);
    min-width: 110px;
    display: flex;
    align-items: center;
    justify-content: center;
}

#check-btn:hover:not(:disabled) {
    background: var(--color-primary-hover);
}

#check-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

/* ===== Spinner ===== */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ===== Result Section ===== */
.result {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== Score Ring ===== */
.score-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--color-border);
}

.score-ring {
    position: relative;
    width: 120px;
    height: 120px;
}

.score-ring svg {
    transform: rotate(-90deg);
    width: 100%;
    height: 100%;
}

.score-ring circle {
    fill: none;
    stroke-width: 8;
    stroke-linecap: round;
}

.score-ring .bg {
    stroke: var(--color-border);
}

.score-ring .progress {
    stroke: var(--color-safe);
    stroke-dasharray: 283;
    stroke-dashoffset: 283;
    transition: stroke-dashoffset 1s ease, stroke 0.5s ease;
}

.score-ring.safe .progress { stroke: var(--color-safe); }
.score-ring.suspect .progress { stroke: var(--color-suspect); }
.score-ring.dangerous .progress { stroke: var(--color-dangerous); }

.score-value {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

#score-number {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
}

.score-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ===== Verdict ===== */
.verdict {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.verdict-emoji {
    font-size: 3rem;
    line-height: 1;
}

.verdict-text {
    font-size: 1.5rem;
    font-weight: 600;
}

.result.safe .verdict-text { color: var(--color-safe); }
.result.suspect .verdict-text { color: var(--color-suspect); }
.result.dangerous .verdict-text { color: var(--color-dangerous); }

/* ===== URLs Info ===== */
.urls-info {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.url-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
}

.url-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.url-value {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    word-break: break-all;
    color: var(--color-text);
}

/* ===== Checks List ===== */
.checks-container h3 {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-md);
}

.checks-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.check-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg);
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
}

.check-item:hover {
    background: var(--color-surface-hover);
}

.check-icon {
    font-size: 1.25rem;
    line-height: 1;
    flex-shrink: 0;
}

.check-content {
    flex: 1;
    min-width: 0;
}

.check-name {
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: var(--spacing-xs);
}

.check-details {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.check-risk {
    font-size: 0.75rem;
    font-weight: 600;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
    background: var(--color-border);
    color: var(--color-text-muted);
}

.check-risk.high {
    background: rgba(239, 68, 68, 0.2);
    color: var(--color-dangerous);
}

.check-risk.medium {
    background: rgba(245, 158, 11, 0.2);
    color: var(--color-suspect);
}

/* ===== Error ===== */
.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--color-dangerous);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    color: var(--color-dangerous);
}

/* ===== Footer ===== */
footer {
    margin-top: auto;
    padding-top: var(--spacing-xl);
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

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

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

/* ===== Responsive ===== */
@media (max-width: 480px) {
    .container {
        padding: var(--spacing-md);
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .input-group {
        flex-direction: column;
    }
    
    #check-btn {
        width: 100%;
    }
    
    .score-container {
        flex-direction: column;
        text-align: center;
    }
}