/* =============================================
   TP2: Registration Form - Professional Styles
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=FERA+Code:wght@400;500;600;700&display=swap');

:root {
    --primary-color: #1e40af;
    --primary-dark: #1e3a8a;
    --secondary-color: #f97316;
    --success-color: #16a34a;
    --error-color: #dc2626;
    --warning-color: #ea580c;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --text-lighter: #9ca3af;
    --bg-color: #f9fafb;
    --bg-alt: #f3f4f6;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --border-light: #f3f4f6;
    --input-border: #d1d5db;
    --focus-color: #1e3a8a;
    
    /* Typography */
    --font-family: 'FERA Code', system-ui, -apple-system, sans-serif;
    --font-serif: 'FERA Code', system-ui, -apple-system, sans-serif;
    
    /* Spacing */
    --spacing-unit: 1rem;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Sizing */
    --max-width: 900px;
    --border-radius: 8px;
    
    /* Transitions */
    --transition: all 0.3s ease;
}

/* =============================================
   Reset and Base Styles
   ============================================= */

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-family);
    color: var(--text-color);
    background: linear-gradient(180deg, var(--primary-dark) 0%, #1e3a7a 100%);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    letter-spacing: -0.3px;
    font-weight: 400;
    overflow-x: hidden;
}

/* =============================================
   Typography
   ============================================= */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.25;
    color: var(--text-color);
}

h1 {
    font-size: 2rem;
}

h2 {
    font-size: 1.875rem;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-lg);
    font-weight: 800;
    letter-spacing: -0.5px;
}

h3 {
    font-size: 1.25rem;
}

p, .description, fieldset > p {
    font-family: var(--font-family);
    line-height: 1.7;
    letter-spacing: -0.2px;
    color: var(--text-light);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

a:focus {
    outline: 2px solid var(--focus-color);
    outline-offset: 2px;
}

/* =============================================
   Header and Navigation
   ============================================= */

header {
    background-color: var(--bg-white);
    border-bottom: 2px solid var(--secondary-color);
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: 0 2px 8px rgba(30, 64, 175, 0.1);
    width: 100%;
    box-sizing: border-box;
}

.navbar {
    max-width: var(--max-width);
    margin: 0 auto;
    width: 100%;
    box-sizing: border-box;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    box-sizing: border-box;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.logo h1 {
    margin: 0;
    font-size: 1.75rem;
    color: var(--primary-dark);
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo .subtitle {
    margin: 4px 0 0 0;
    font-size: 0.85rem;
    color: var(--secondary-color);
    font-weight: 600;
}

.breadcrumb {
    display: flex;
    align-items: center;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--secondary-color);
    color: white;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
    text-decoration: none;
}

.back-btn:hover {
    background-color: #ea580c;
    transform: translateX(-3px);
    box-shadow: 0 4px 12px rgba(249, 115, 22, 0.25);
    text-decoration: none;
}

.back-btn:focus {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
}

/* =============================================
   Main Content
   ============================================= */

main {
    min-height: auto;
    padding: var(--spacing-xl) var(--spacing-lg) var(--spacing-2xl);
}

.form-container {
    max-width: 700px;
    margin: var(--spacing-xl) auto;
    padding: 0;
    width: 100%;
}

.form-wrapper {
    background-color: var(--bg-white);
    padding: var(--spacing-xl) var(--spacing-lg);
    border-radius: 16px;
    box-shadow: 0 8px 16px rgba(30, 64, 175, 0.1);
    border: 1px solid var(--border-light);
}

.form-wrapper h2 {
    margin-top: 0;
}

.form-description {
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--border-light);
    line-height: 1.6;
}

.required-asterisk {
    color: var(--error-color);
    font-weight: bold;
}

/* =============================================
   Form Elements
   ============================================= */

fieldset {
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: var(--spacing-lg) var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, rgba(249, 115, 22, 0.02) 0%, rgba(30, 64, 175, 0.02) 100%);
}

legend {
    padding: 0 var(--spacing-md);
    font-weight: 700;
    color: var(--primary-dark);
    font-size: 1.05rem;
    letter-spacing: -0.3px;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

legend .material-icons {
    color: var(--secondary-color);
    font-size: 1.4rem;
    width: 26px;
    height: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
}

legend i {
    color: var(--secondary-color);
    font-size: 1.15rem;
}
}

.fieldset-description {
    font-size: 0.95rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
}

.form-group {
    margin-bottom: var(--spacing-md);
    padding: 0;
}

label {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--text-color);
    gap: var(--spacing-sm);
}

label .material-icons {
    color: var(--primary-color);
    font-size: 1.3rem;
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

label i {
    color: var(--primary-color);
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="password"],
input[type="date"],
input[type="file"],
select,
textarea {
    width: 100%;
    padding: 11px 14px;
    padding-left: 14px;
    border: 1px solid var(--input-border);
    border-radius: 8px;
    font-family: var(--font-family);
    font-size: 1rem;
    color: var(--text-color);
    background-color: var(--bg-white);
    transition: var(--transition);
    letter-spacing: -0.2px;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus,
input[type="password"]:focus,
input[type="date"]:focus,
input[type="file"]:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
    background-color: rgba(30, 64, 175, 0.01);
}

/* Form validation states */
input:invalid:not(:placeholder-shown),
select:invalid:not(:placeholder-shown),
textarea:invalid:not(:placeholder-shown) {
    border-color: var(--error-color);
}

input:valid:not(:placeholder-shown),
select:valid:not(:placeholder-shown) {
    border-color: var(--success-color);
}

textarea {
    resize: vertical;
    min-height: 120px;
    font-family: var(--font-family);
}

/* =============================================
   Form Help and Error Text
   ============================================= */

code, pre, .help-text {
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    background-color: var(--bg-alt);
    padding: 2px 6px;
    border-radius: 4px;
}

.form-error {
    display: block;
    color: var(--error-color);
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
    font-weight: 500;
}

/* =============================================
   Radio Buttons
   ============================================= */

.radio-group {
    border: none;
    padding: 0;
    background-color: transparent;
}

.radio-group legend {
    padding: 0;
    margin-bottom: var(--spacing-md);
}

.radio-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.radio-option,
.checkbox-option {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.radio-option.large,
.checkbox-option.large {
    align-items: baseline;
}

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

.radio-option label,
.checkbox-option label {
    margin: 0;
    font-weight: normal;
    cursor: pointer;
    transition: var(--transition);
}

.radio-option label:hover,
.checkbox-option label:hover {
    color: var(--primary-color);
}

/* =============================================
   Checkbox Group
   ============================================= */

.checkbox-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

/* =============================================
   Character Counter
   ============================================= */

.char-count {
    display: block;
    font-size: 0.875rem;
    color: var(--text-light);
    margin-top: var(--spacing-xs);
    text-align: right;
}

/* =============================================
   Buttons
   ============================================= */

.form-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-light);
    flex-wrap: wrap;
}

button {
    cursor: pointer;
    font-family: var(--font-family);
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
    font-size: 1rem;
}

.button {
    padding: var(--spacing-md) var(--spacing-xl);
    min-width: 150px;
}

.button-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    font-weight: 700;
}

.button-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, #162e5c 100%);
    box-shadow: 0 12px 24px rgba(30, 64, 175, 0.3);
    transform: translateY(-2px);
}

.button-primary:focus {
    outline: 2px solid var(--focus-color);
    outline-offset: 2px;
}

.button-primary:active {
    transform: scale(0.98);
}

.button-secondary {
    background-color: var(--bg-alt);
    color: var(--text-color);
    border: 1px solid var(--border-light);
}

.button-secondary:hover {
    background-color: white;
    border-color: var(--secondary-color);
    box-shadow: 0 4px 12px rgba(249, 115, 22, 0.1);
}

.button-secondary:focus {
    outline: 2px solid var(--focus-color);
    outline-offset: 2px;
}

/* =============================================
   Form Messages
   ============================================= */

.form-message {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius);
    display: none;
    font-weight: 500;
}

.form-message.success {
    display: block;
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.form-message.error {
    display: block;
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* =============================================
   Footer
   ============================================= */

footer {
    background-color: var(--primary-dark);
    color: white;
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-2xl);
    text-align: center;
    border-top: 4px solid var(--secondary-color);
    font-weight: 400;
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.footer-content p {
    margin: 0;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
    font-weight: 400;
}

/* =============================================
   Responsive Design
   ============================================= */

@media (max-width: 768px) {
    main {
        padding: var(--spacing-2xl) var(--spacing-md);
    }

    .form-wrapper {
        padding: var(--spacing-lg);
        border-radius: 12px;
    }

    .form-actions {
        flex-direction: column;
    }

    .button {
        width: 100%;
    }

    .radio-container,
    .checkbox-group {
        grid-template-columns: 1fr;
    }

    .nav-container {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    label {
        font-size: 0.95rem;
    }

    label i {
        font-size: 1rem;
    }

    fieldset {
        padding: var(--spacing-lg);
        margin-bottom: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    main {
        padding: var(--spacing-lg) var(--spacing-sm);
    }

    .form-wrapper {
        padding: var(--spacing-lg);
        border-radius: 8px;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    }

    h2 {
        font-size: 1.5rem;
    }

    label {
        font-size: 0.9rem;
    }

    label i {
        font-size: 0.95rem;
        width: 18px;
    }

    fieldset {
        padding: var(--spacing-md);
        margin-bottom: var(--spacing-md);
    }

    legend {
        font-size: 0.95rem;
        padding: 0 var(--spacing-sm);
    }

    .form-group {
        margin-bottom: var(--spacing-md);
    }

    input[type="text"],
    input[type="email"],
    input[type="tel"],
    input[type="password"],
    input[type="date"],
    input[type="file"],
    select,
    textarea {
        padding: 10px 12px;
        font-size: 16px;
    }
}

/* =============================================
   Accessibility
   ============================================= */

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

:focus-visible {
    outline: 2px solid var(--focus-color);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    body {
        background-color: white;
    }

    header,
    footer {
        display: none;
    }

    .form-wrapper {
        box-shadow: none;
        border: none;
    }
}