/* register.css - Dark Cyan Theme (Matching Login Page) */
:root {
    --primary-dark: #006064;
    --primary: #00838f;
    --primary-light: #4fb3bf;
    --primary-very-light: #e0f7fa;
    --accent: #00acc1;
    --text-light: #ffffff;
    --text-dark: #37474f;
    --background: #004d4d;
    --success: #2e7d32;
    --error-bg: #ffebee;
    --error-text: #c62828;
    --optional-bg: #b2ebf2;
    --shadow: 0 8px 20px rgba(0, 77, 64, 0.3);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--background) 0%, #006666 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
    padding: 20px;
}

.register-container {
    width: 100%;
    max-width: 550px;
    margin: 0 auto;
}

.register-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px 35px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease;
}

.register-card:hover {
    transform: translateY(-5px);
}

.register-header {
    text-align: center;
    margin-bottom: 30px;
}

.register-header h2 {
    color: var(--primary-dark);
    font-size: 2.2em;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.register-header p {
    color: var(--text-dark);
    font-size: 0.95em;
    opacity: 0.8;
}

.register-form {
    margin-bottom: 25px;
}

.input-group {
    margin-bottom: 20px;
    position: relative;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--primary-dark);
    font-weight: 500;
    font-size: 0.95em;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.optional-badge {
    background: var(--optional-bg);
    color: var(--primary-dark);
    font-size: 0.7em;
    padding: 2px 8px;
    border-radius: 12px;
    font-weight: normal;
    text-transform: lowercase;
}

.form-input {
    width: 100%;
    padding: 14px 40px 14px 15px;
    border: 2px solid #e0f2f1;
    border-radius: 12px;
    font-size: 1em;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.9);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 131, 143, 0.1);
}

.form-input.error-input {
    border-color: var(--error-text);
    background-color: #fff8f8;
}

.input-icon {
    position: absolute;
    right: 15px;
    top: 42px;
    color: var(--primary);
    font-size: 1.2em;
}

.input-error {
    color: var(--error-text);
    font-size: 0.8em;
    margin-top: 5px;
    padding-left: 10px;
}

/* Error Message */
.error-message {
    background: var(--error-bg);
    border-left: 4px solid var(--error-text);
    border-radius: 8px;
    padding: 12px 15px;
    margin: 20px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.error-icon {
    font-size: 1.2em;
}

.error {
    color: var(--error-text);
    font-size: 0.9em;
    margin: 0;
}

/* Register Button */
.register-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 25px;
    box-shadow: 0 4px 15px rgba(0, 96, 100, 0.3);
}

.register-btn:hover {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 96, 100, 0.4);
}

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

/* Terms Section */
.terms-section {
    margin: 25px 0;
    text-align: center;
}

.terms-text {
    color: var(--text-dark);
    font-size: 0.85em;
    line-height: 1.5;
    opacity: 0.8;
}

.terms-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.terms-link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* Footer */
.register-footer {
    text-align: center;
    margin-top: 20px;
    border-top: 1px solid #e0f2f1;
    padding-top: 25px;
}

.login-section {
    color: var(--text-dark);
    font-size: 0.95em;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}

.login-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    padding: 5px 10px;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.login-link:hover {
    background: var(--primary-very-light);
    transform: translateX(3px);
}

.security-note {
    text-align: center;
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px dashed var(--primary-light);
}

.security-note p {
    color: var(--text-dark);
    font-size: 0.85em;
    opacity: 0.7;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

/* Tooltip for optional fields (optional) */
[data-tooltip] {
    position: relative;
    cursor: help;
}

[data-tooltip]:before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding: 5px 10px;
    background: var(--primary-dark);
    color: white;
    font-size: 0.75em;
    border-radius: 4px;
    white-space: nowrap;
    display: none;
    z-index: 10;
}

[data-tooltip]:hover:before {
    display: block;
}

/* Responsive Design */
@media (max-width: 480px) {
    .register-card {
        padding: 30px 20px;
    }
    
    .register-header h2 {
        font-size: 1.8em;
    }
    
    .input-icon {
        top: 40px;
    }
    
    .optional-badge {
        font-size: 0.65em;
    }
}

/* Animation for form elements */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.input-group, .register-btn, .terms-section, .register-footer {
    animation: fadeInUp 0.5s ease forwards;
}

.input-group:nth-child(1) { animation-delay: 0.1s; }
.input-group:nth-child(2) { animation-delay: 0.2s; }
.input-group:nth-child(3) { animation-delay: 0.3s; }
.input-group:nth-child(4) { animation-delay: 0.4s; }
.register-btn { animation-delay: 0.5s; }
.terms-section { animation-delay: 0.6s; }
.register-footer { animation-delay: 0.7s; }

/* Loading state for button (optional) */
.register-btn.loading {
    position: relative;
    color: transparent;
}

.register-btn.loading:after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    top: 50%;
    left: 50%;
    margin-left: -10px;
    margin-top: -10px;
    border: 2px solid white;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spinner 0.6s linear infinite;
}

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