:root {
    --primary-color: #ff4d4d;
    --secondary-color: #ff6b6b;
    --accent-color: #ff3333;
    --success-color: #00d26a;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --info-color: #17a2b8;
    --dark-bg: #0f0f0f;
    --card-bg: #1a1a1a;
    --surface-bg: #242424;
    --text-primary: #ffffff;
    --text-secondary: #8892b0;
    --text-muted: #64748b;
    --border-color: #2d2d2d;
    --border-light: #374151;
    --gradient-1: linear-gradient(45deg, #ff4d4d, #ff6b6b);
    --gradient-security: linear-gradient(45deg, #28a745, #20c997);
    --gradient-form: linear-gradient(45deg, #007bff, #0056b3);
    --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.2), 0 2px 4px -1px rgba(0, 0, 0, 0.1);
    --shadow-elevated: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --glow: 0 0 20px rgba(255, 77, 77, 0.3);
    --glow-form: 0 0 20px rgba(0, 123, 255, 0.3);
}

body {
    background: var(--dark-bg);
    color: var(--text-primary);
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    min-height: 100vh;
}

/* Register Section */
.register-section {
    background: linear-gradient(rgba(0, 0, 0, 0.8), rgba(0, 0, 0, 0.8));
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.register-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 20%, rgba(255, 77, 77, 0.2) 0%, transparent 70%);
    pointer-events: none;
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
    0% {
        opacity: 0.5;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
    100% {
        opacity: 0.5;
        transform: scale(1);
    }
}

/* Register Card */
.register-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 3.5rem 4rem;
    box-shadow: var(--shadow-elevated);
    backdrop-filter: blur(20px);
    position: relative;
    overflow: hidden;
    width: 100%;
    margin: 0 auto;
    animation: fadeInUp 0.8s ease forwards;
}

.register-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-1);
    border-radius: 24px 24px 0 0;
}

.register-card:hover {
    box-shadow: var(--glow);
    border-color: rgba(255, 77, 77, 0.5);
}

/* Register Header */
.register-header {
    text-align: center;
    margin-bottom: 2rem;
}

.register-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 2rem;
    box-shadow: var(--glow);
    animation: float 4s ease-in-out infinite;
}

.register-title {
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.register-subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Form Styling */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 0.5rem;
    display: block;
}

.form-control {
    background: var(--surface-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    padding: 1rem 1rem 1rem 3rem;
    font-size: 1rem;
    transition: all 0.3s ease;
    width: 100%;
}

.form-control:focus {
    background: var(--surface-bg);
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(255, 77, 77, 0.1);
    color: var(--text-primary);
}

.form-control::placeholder {
    color: var(--text-muted);
}

.form-icon {
    position: relative;
}

.form-icon i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    font-size: 1.1rem;
    z-index: 2;
}

.form-control:focus + i,
.form-control:not(:placeholder-shown) + i {
    color: var(--primary-color);
}

/* Alert Messages */
.alert {
    border: none;
    border-radius: 12px;
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    animation: slideInDown 0.5s ease;
}

.alert-success {
    background: rgba(0, 210, 106, 0.1);
    border-left: 4px solid var(--success-color);
    color: var(--success-color);
}

.alert-warning {
    background: rgba(255, 193, 7, 0.1);
    border-left: 4px solid var(--warning-color);
    color: var(--warning-color);
}

.alert-danger {
    background: rgba(220, 53, 69, 0.1);
    border-left: 4px solid var(--danger-color);
    color: var(--danger-color);
}

.alert i {
    margin-right: 0.75rem;
    font-size: 1.2rem;
}

/* Password Requirements */
.password-requirements {
    background: var(--surface-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    margin-top: 0.5rem;
    font-size: 0.9rem;
}

.requirement {
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
}

.requirement i {
    margin-right: 0.5rem;
    width: 16px;
}

.requirement.valid {
    color: var(--success-color);
}

.requirement.invalid {
    color: var(--danger-color);
}

/* Register Button */
.register-btn {
    background: var(--gradient-1);
    border: none;
    border-radius: 12px;
    color: white;
    font-weight: 600;
    padding: 1rem 2rem;
    font-size: 1rem;
    width: 100%;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.register-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--glow);
    color: white;
}

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

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

/* Login Link */
.login-link {
    text-align: center;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.login-link p {
    color: var(--text-secondary);
    margin: 0;
}

.login-link a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.login-link a:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    .register-card {
        padding: 2rem 2.5rem;
        margin: 1rem;
        border-radius: 16px;
        max-width: 100%;
    }

    .register-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }

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

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

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

@keyframes float {
    0% {
        transform: translateY(0px);
    }
    25% {
        transform: translateY(-5px);
    }
    50% {
        transform: translateY(0px);
    }
    75% {
        transform: translateY(5px);
    }
    100% {
        transform: translateY(0px);
    }
}

/* Loading State */
.loading {
    position: relative;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid transparent;
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.footer-bar-animation {
    margin-top: -50px;
}