:root {
    --bg-color: #0f172a;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* Animated Background */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    background: radial-gradient(circle at 15% 50%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 85% 30%, rgba(16, 185, 129, 0.1) 0%, transparent 50%);
    animation: bgPulse 15s ease-in-out infinite alternate;
}

@keyframes bgPulse {
    0% { transform: scale(1); }
    100% { transform: scale(1.1); }
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
}

.lang-switcher select {
    background: var(--glass-bg);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    outline: none;
    font-family: inherit;
    cursor: pointer;
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 1.5rem;
    padding: 2.5rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    overflow: hidden;
    position: relative;
}

.steps-indicator {
    display: flex;
    justify-content: space-between;
    margin-bottom: 2.5rem;
    position: relative;
}

.steps-indicator::before {
    content: '';
    position: absolute;
    top: 14px;
    left: 10%;
    right: 10%;
    height: 2px;
    background: var(--glass-border);
    z-index: 0;
}

.step {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.step.active {
    color: var(--accent);
}

.step.completed {
    color: var(--success);
}

.step-num {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--bg-color);
    border: 2px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    transition: all 0.3s ease;
}

.step.active .step-num {
    border-color: var(--accent);
    background: var(--accent);
    color: white;
}

.step.completed .step-num {
    border-color: var(--success);
    background: var(--success);
    color: white;
}

.step span {
    font-size: 0.875rem;
    font-weight: 500;
}

.view {
    display: none;
    animation: fadeIn 0.5s ease;
}

.view.active {
    display: block;
}

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

h1, h2 {
    margin-bottom: 1rem;
    font-weight: 700;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }

p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

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

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.input-group input,
.input-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
    resize: vertical;
}

.input-group input:focus,
.input-group textarea:focus {
    border-color: var(--accent);
}

.alert {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1.5rem;
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.2);
    color: var(--warning);
}

.alert.info {
    background: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.2);
    color: var(--accent);
}

.btn {
    display: inline-block;
    width: 100%;
    padding: 1rem;
    border-radius: 0.5rem;
    border: none;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
}

.btn.primary {
    background: var(--accent);
    color: white;
}

.btn.primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.progress-bar-container {
    width: 100%;
    height: 6px;
    background: rgba(255,255,255,0.1);
    border-radius: 3px;
    margin: 1.5rem 0;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    width: 0%;
    background: var(--accent);
    transition: width 0.3s ease;
}

.test-log {
    list-style: none;
    margin: 0;
    padding: 0;
    max-height: 200px;
    overflow-y: auto;
    font-family: monospace;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.test-log li {
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.test-log li.success { color: var(--success); }
.test-log li.error { color: var(--error); }
.test-log li.warning { color: var(--warning); }

.test-log li::before {
    content: '>';
    color: var(--accent);
}

.success-icon {
    display: flex;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.result-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-top: 1rem;
}

@media (min-width: 640px) {
    .result-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.result-item {
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--glass-border);
    padding: 1rem;
    border-radius: 0.5rem;
}

.result-item .label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.result-item .val {
    font-weight: 600;
}

.result-item .val.success { color: var(--success); }
.result-item .val.error { color: var(--error); }
.result-item .val.warning { color: var(--warning); }

.footer {
    text-align: center;
    padding: 2rem 0;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* RTL Support */
[dir="rtl"] {
    font-family: 'Vazirmatn', 'Inter', Tahoma, sans-serif; /* Fallback for Farsi */
}

[dir="rtl"] .logo {
    flex-direction: row-reverse;
}

[dir="rtl"] .alert {
    flex-direction: row-reverse;
    text-align: right;
}

[dir="rtl"] .test-log li {
    flex-direction: row-reverse;
}

[dir="rtl"] .test-log li::before {
    content: '<';
}

[dir="rtl"] .result-item {
    text-align: right;
}