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

:root {
    --primary: #667eea;
    --secondary: #764ba2;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #fbbf24;
    --dark: #0f172a;
    --light: #f1f5f9;
}

body {
    font-family: 'Cairo', sans-serif;
    background: #0f172a;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    position: relative;
    overflow-x: hidden;
}

/* خلفية بسيطة مثل Landing Page */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(ellipse at top, rgba(102, 126, 234, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at bottom, rgba(118, 75, 162, 0.15) 0%, transparent 50%);
    z-index: -1;
}

/* نجوم في الخلفية */
.stars-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: -1;
}

.star-auth {
    position: absolute;
    background: white;
    border-radius: 50%;
    animation: twinkle linear infinite;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.8);
}

@keyframes twinkle {
    0%, 100% {
        opacity: 0.3;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.2);
    }
}

.auth-container {
    width: 100%;
    max-width: 600px;
    animation: fadeInUp 0.6s ease;
    perspective: 2000px;
}

.auth-card {
    background: rgba(30, 41, 59, 0.85);
    border-radius: 24px;
    padding: 30px;
    box-shadow: 
        0 25px 70px rgba(0, 0, 0, 0.5),
        0 50px 100px rgba(102, 126, 234, 0.2),
        inset 0 0 100px rgba(102, 126, 234, 0.05);
    backdrop-filter: blur(20px);
    border: 2px solid rgba(102, 126, 234, 0.3);
    transform-style: preserve-3d;
    transition: transform 0.3s ease;
    perspective: 1000px;
}

.auth-header {
    text-align: center;
    margin-bottom: 25px;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 15px;
}

.logo i {
    font-size: 40px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: rotate 3s linear infinite, float3d 6s ease-in-out infinite;
    transform-style: preserve-3d;
    filter: drop-shadow(2px 2px 20px rgba(102, 126, 234, 0.6)) drop-shadow(-2px -2px 20px rgba(118, 75, 162, 0.6));
}

.logo h1 {
    font-size: 32px;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.auth-header h2 {
    font-size: 26px;
    font-weight: 800;
    color: #f1f5f9;
    margin-bottom: 8px;
}

.auth-header p {
    color: #cbd5e1;
    font-size: 15px;
    font-weight: 500;
}

.auth-form {
    margin-top: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 15px;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    color: #f1f5f9;
    margin-bottom: 8px;
    font-size: 14px;
}

.form-group label i {
    color: var(--primary);
    font-size: 16px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid rgba(102, 126, 234, 0.3);
    border-radius: 12px;
    font-size: 14px;
    font-family: 'Cairo', sans-serif;
    font-weight: 600;
    transition: all 0.3s ease;
    background: rgba(15, 23, 42, 0.5);
    color: #f1f5f9;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(15, 23, 42, 0.7);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.2);
}

.password-input {
    position: relative;
}

.password-input input {
    padding-left: 50px;
}

.toggle-password {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    color: #94a3b8;
    font-size: 18px;
    transition: all 0.3s ease;
}

.toggle-password:hover {
    color: var(--primary);
}

.password-strength {
    margin-top: 10px;
}

.strength-bar {
    height: 6px;
    background: #e2e8f0;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 8px;
}

.strength-fill {
    height: 100%;
    width: 0%;
    background: #ef4444;
    transition: all 0.3s ease;
    border-radius: 10px;
}

.strength-text {
    font-size: 13px;
    font-weight: 700;
    color: #ef4444;
}

.password-match {
    display: block;
    margin-top: 8px;
    font-size: 13px;
    font-weight: 700;
}

.password-match.match {
    color: var(--success);
}

.password-match.no-match {
    color: var(--danger);
}

.date-inputs {
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    gap: 10px;
}

.checkbox-group {
    margin: 20px 0 15px;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    cursor: pointer;
    font-weight: 600;
    color: #cbd5e1;
    line-height: 1.6;
}

.checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--primary);
    cursor: pointer;
    margin-top: 2px;
}

.checkbox-label a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 700;
}

.checkbox-label a:hover {
    text-decoration: underline;
}

.error-message,
.success-message {
    padding: 12px 16px;
    border-radius: 12px;
    margin-bottom: 15px;
    font-weight: 700;
    font-size: 13px;
    display: none;
}

.error-message {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 2px solid rgba(239, 68, 68, 0.2);
}

.success-message {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 2px solid rgba(16, 185, 129, 0.2);
}

.error-message.show,
.success-message.show {
    display: block;
    animation: slideDown 0.3s ease;
}

.btn-submit {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border: none;
    border-radius: 14px;
    font-size: 16px;
    font-weight: 800;
    font-family: 'Cairo', sans-serif;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: 
        0 8px 25px rgba(102, 126, 234, 0.4),
        0 15px 40px rgba(118, 75, 162, 0.3);
    transform-style: preserve-3d;
}

.btn-submit:hover {
    transform: translateY(-5px) translateZ(20px);
    box-shadow: 
        0 15px 45px rgba(102, 126, 234, 0.7),
        0 25px 60px rgba(118, 75, 162, 0.5);
}

.btn-submit:active {
    transform: translateY(-1px);
}

.auth-footer {
    text-align: center;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 2px solid rgba(102, 126, 234, 0.2);
}

.auth-footer p {
    color: #cbd5e1;
    font-weight: 600;
}

.auth-footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 800;
}

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

/* OTP Styles */
.otp-card {
    max-width: 500px;
}

.otp-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: pulse 2s infinite;
}

.otp-icon i {
    font-size: 48px;
    color: white;
}

.email-sent {
    color: #64748b;
    font-size: 14px;
    margin-top: 15px;
}

.email-sent strong {
    color: var(--primary);
}

.test-otp {
    background: rgba(251, 191, 36, 0.1);
    padding: 12px;
    border-radius: 10px;
    margin-top: 15px;
    border: 2px solid rgba(251, 191, 36, 0.3);
}

.test-otp strong {
    color: var(--warning);
    font-size: 20px;
    letter-spacing: 3px;
}

.otp-inputs {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-bottom: 25px;
}

.otp-input {
    width: 60px;
    height: 70px;
    text-align: center;
    font-size: 28px;
    font-weight: 900;
    border: 3px solid #e2e8f0;
    border-radius: 14px;
    background: #f8fafc;
    color: var(--dark);
    transition: all 0.3s ease;
}

.otp-input:focus {
    outline: none;
    border-color: var(--primary);
    background: white;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.15);
    transform: scale(1.05);
}

.resend-otp {
    text-align: center;
    margin-top: 25px;
}

.resend-otp p {
    color: #64748b;
    font-size: 14px;
    margin-bottom: 12px;
}

.btn-resend {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
    padding: 12px 30px;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 700;
    font-family: 'Cairo', sans-serif;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes float3d {
    0%, 100% {
        transform: translateZ(0px) rotateX(0deg) rotateY(0deg);
    }
    25% {
        transform: translateZ(30px) rotateX(2deg) rotateY(-2deg);
    }
    50% {
        transform: translateZ(50px) rotateX(-2deg) rotateY(2deg);
    }
    75% {
        transform: translateZ(30px) rotateX(2deg) rotateY(2deg);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .auth-card {
        padding: 30px 20px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .date-inputs {
        grid-template-columns: 1fr;
    }
    
    .otp-inputs {
        gap: 8px;
    }
    
    .otp-input {
        width: 50px;
        height: 60px;
        font-size: 24px;
    }
}