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

:root {
    --bg-primary: #0a0e1a;
    --bg-card: rgba(15, 20, 40, 0.85);
    --bg-input: rgba(20, 28, 55, 0.9);
    --border-color: rgba(255, 165, 0, 0.15);
    --accent: #e8952e;
    --accent-glow: rgba(232, 149, 46, 0.3);
    --text-primary: #e8e0d4;
    --text-secondary: #8a8494;
    --text-hint: #5a5466;
    --error: #e84545;
    --success: #2ecc71;
    --science: #4a9eff;
    --military: #ff4a4a;
    --trade: #4aff7a;
    --explorer: #4affea;
    --neutral: #aaaaaa;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Yildiz arka planlari */
.stars {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    background:
        radial-gradient(1px 1px at 10% 20%, rgba(255,255,255,0.8) 0%, transparent 100%),
        radial-gradient(1px 1px at 30% 65%, rgba(255,255,255,0.6) 0%, transparent 100%),
        radial-gradient(1px 1px at 50% 10%, rgba(255,255,255,0.7) 0%, transparent 100%),
        radial-gradient(1px 1px at 70% 40%, rgba(255,255,255,0.5) 0%, transparent 100%),
        radial-gradient(1px 1px at 90% 80%, rgba(255,255,255,0.6) 0%, transparent 100%),
        radial-gradient(1.5px 1.5px at 15% 85%, rgba(232,149,46,0.4) 0%, transparent 100%),
        radial-gradient(1.5px 1.5px at 85% 15%, rgba(232,149,46,0.3) 0%, transparent 100%);
}

.stars-2 {
    opacity: 0.5;
    background:
        radial-gradient(1px 1px at 5% 50%, rgba(255,255,255,0.4) 0%, transparent 100%),
        radial-gradient(1px 1px at 25% 30%, rgba(255,255,255,0.3) 0%, transparent 100%),
        radial-gradient(1px 1px at 45% 90%, rgba(255,255,255,0.4) 0%, transparent 100%),
        radial-gradient(1px 1px at 65% 60%, rgba(255,255,255,0.3) 0%, transparent 100%),
        radial-gradient(1px 1px at 95% 25%, rgba(255,255,255,0.4) 0%, transparent 100%);
}

.stars-3 {
    opacity: 0.3;
    background:
        radial-gradient(2px 2px at 20% 70%, rgba(232,149,46,0.2) 0%, transparent 100%),
        radial-gradient(2px 2px at 60% 20%, rgba(232,149,46,0.15) 0%, transparent 100%),
        radial-gradient(2px 2px at 80% 50%, rgba(232,149,46,0.2) 0%, transparent 100%);
}

/* Auth Container */
.auth-container {
    width: 100%;
    max-width: 440px;
    padding: 20px;
    position: relative;
    z-index: 1;
}

.auth-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 40px 32px;
    backdrop-filter: blur(20px);
    box-shadow:
        0 0 40px rgba(0, 0, 0, 0.5),
        0 0 80px rgba(232, 149, 46, 0.05),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

/* Logo */
.auth-header {
    text-align: center;
    margin-bottom: 32px;
}

.logo-ring {
    width: 80px;
    height: 80px;
    margin: 0 auto 16px;
    position: relative;
}

.logo-planet {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent) 0%, #c67b1a 100%);
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 20px var(--accent-glow);
}

.logo-ring-orbit {
    width: 80px;
    height: 24px;
    border: 2px solid rgba(232, 149, 46, 0.3);
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotateX(60deg);
}

.auth-header h1 {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: 12px;
    color: var(--accent);
    text-shadow: 0 0 30px var(--accent-glow);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 13px;
    margin-top: 4px;
    letter-spacing: 1px;
}

/* Tab Bar */
.tab-bar {
    display: flex;
    gap: 4px;
    margin-bottom: 24px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    padding: 4px;
}

.tab-btn {
    flex: 1;
    padding: 10px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.tab-btn.active {
    background: rgba(232, 149, 46, 0.15);
    color: var(--accent);
}

.tab-btn:hover:not(.active) {
    color: var(--text-primary);
}

/* Form Panel */
.form-panel {
    display: none;
}

.form-panel.active {
    display: block;
}

/* Input Group */
.input-group {
    margin-bottom: 18px;
}

.input-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.input-group input[type="text"],
.input-group input[type="email"],
.input-group input[type="password"] {
    width: 100%;
    padding: 12px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.input-group input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.input-hint {
    display: block;
    font-size: 11px;
    color: var(--text-hint);
    margin-top: 4px;
}

/* Faction Grid */
.faction-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.faction-option {
    cursor: pointer;
}

.faction-option input[type="radio"] {
    display: none;
}

.faction-card {
    padding: 10px 8px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    text-align: center;
    transition: all 0.3s ease;
}

.faction-option input:checked + .faction-card {
    border-color: var(--accent);
    background: rgba(232, 149, 46, 0.08);
    box-shadow: 0 0 12px rgba(232, 149, 46, 0.1);
}

.faction-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    margin: 0 auto 6px;
}

.faction-icon.science  { background: linear-gradient(135deg, var(--science), #2670c9); }
.faction-icon.military { background: linear-gradient(135deg, var(--military), #c92626); }
.faction-icon.trade    { background: linear-gradient(135deg, var(--trade), #1fa84a); }
.faction-icon.explorer { background: linear-gradient(135deg, var(--explorer), #1fa89e); }
.faction-icon.neutral  { background: linear-gradient(135deg, var(--neutral), #777); }

.faction-name {
    display: block;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.faction-desc {
    display: block;
    font-size: 10px;
    color: var(--text-hint);
}

/* Neutral faction spans full width */
.faction-option:last-child {
    grid-column: 1 / -1;
}

.faction-option:last-child .faction-card {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    text-align: left;
}

.faction-option:last-child .faction-icon {
    margin: 0;
    flex-shrink: 0;
}

/* Button */
.btn {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), #c67b1a);
    color: #0a0e1a;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover {
    box-shadow: 0 6px 25px rgba(232, 149, 46, 0.4);
    transform: translateY(-1px);
}

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

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Message */
.message {
    margin-top: 16px;
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 13px;
    display: none;
    text-align: center;
}

.message.error {
    display: block;
    background: rgba(232, 69, 69, 0.1);
    border: 1px solid rgba(232, 69, 69, 0.3);
    color: var(--error);
}

.message.success {
    display: block;
    background: rgba(46, 204, 113, 0.1);
    border: 1px solid rgba(46, 204, 113, 0.3);
    color: var(--success);
}

/* Responsive */
@media (max-width: 480px) {
    .auth-card {
        padding: 28px 20px;
    }

    .auth-header h1 {
        font-size: 26px;
        letter-spacing: 8px;
    }

    .faction-grid {
        grid-template-columns: 1fr;
    }

    .faction-option:last-child {
        grid-column: auto;
    }
}