/**
 * SIGNUP PAGE - International Standards Compliant
 * ================================================
 * - WCAG 2.1 AA Accessibility
 * - 8px Grid System
 * - Touch-friendly (44px+ targets)
 * - Proper label associations
 * - Keyboard navigation support
 * - Screen reader compatible
 */

/* ============================================
   CSS CUSTOM PROPERTIES (8px Grid System)
   ============================================ */
:root {
    --signup-space-1: 4px;
    --signup-space-2: 8px;
    --signup-space-3: 12px;
    --signup-space-4: 16px;
    --signup-space-5: 20px;
    --signup-space-6: 24px;
    --signup-space-8: 32px;
    --signup-space-10: 40px;
    
    --signup-radius-sm: 8px;
    --signup-radius-md: 12px;
    --signup-radius-lg: 16px;
    
    --signup-input-height: 48px;
    --signup-btn-height: 48px;
    --signup-max-width: 480px;
    
    --signup-color-primary: #1A3C34;
    --signup-color-primary-dark: #142e28;
    --signup-color-accent: #C5A089;
    --signup-color-error: #dc2626;
    --signup-color-error-bg: #fef2f2;
    --signup-color-success: #16a34a;
    --signup-color-text: #1f2937;
    --signup-color-text-muted: #6b7280;
    --signup-color-border: #e5e7eb;
    --signup-color-border-focus: #C5A089;
    --signup-color-bg: #f9fafb;
    --signup-color-card: #ffffff;
    
    --signup-shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
    --signup-shadow-xl: 0 20px 40px -10px rgba(26, 60, 52, 0.15);
}

/* ============================================
   PAGE LAYOUT - Single Screen Optimized
   ============================================ */
.signup-page {
    min-height: calc(100vh - 120px);
    background: var(--signup-color-bg);
    padding: var(--signup-space-4) var(--signup-space-4);
    display: flex;
    align-items: center;
    justify-content: center;
}

.signup-container {
    width: 100%;
    max-width: 520px;
    margin: 0 auto;
}

/* ============================================
   CARD COMPONENT
   ============================================ */
.signup-card {
    background: var(--signup-color-card);
    border-radius: var(--signup-radius-lg);
    box-shadow: var(--signup-shadow-xl);
    overflow: hidden;
}

/* Card Header - Compact */
.signup-header {
    background: linear-gradient(135deg, var(--signup-color-primary) 0%, var(--signup-color-primary-dark) 100%);
    padding: var(--signup-space-4) var(--signup-space-5);
    text-align: center;
    position: relative;
}

.signup-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 20%, rgba(197, 160, 137, 0.15) 0%, transparent 50%);
    pointer-events: none;
}

.signup-icon-wrap {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--signup-space-2);
    background: rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.signup-icon-wrap i {
    font-size: 20px;
    color: var(--signup-color-accent);
}

.signup-header h1 {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 1.375rem;
    font-weight: 700;
    color: #ffffff;
    margin: 0 0 2px 0;
    line-height: 1.2;
    position: relative;
}

.signup-header p {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.85);
    margin: 0;
    position: relative;
}

/* Card Body - Compact */
.signup-body {
    padding: var(--signup-space-5) var(--signup-space-5);
}

/* ============================================
   ALERT COMPONENTS
   ============================================ */
.signup-alert {
    display: flex;
    align-items: center;
    gap: var(--signup-space-2);
    padding: var(--signup-space-3);
    border-radius: var(--signup-radius-sm);
    margin-bottom: var(--signup-space-4);
    font-size: 0.8125rem;
    line-height: 1.4;
}

.signup-alert--error {
    background: var(--signup-color-error-bg);
    border: 1px solid #fecaca;
    color: #991b1b;
}

.signup-alert--error i {
    color: var(--signup-color-error);
    font-size: 18px;
}

/* ============================================
   FORM STRUCTURE - Compact Single Screen
   ============================================ */
.signup-form {
    display: flex;
    flex-direction: column;
    gap: var(--signup-space-3);
}

.signup-form__row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--signup-space-3);
}

.signup-form__group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

/* ============================================
   FORM LABELS (WCAG Compliant)
   ============================================ */
.signup-label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--signup-color-text);
    line-height: 1.2;
}

.signup-label__required {
    color: var(--signup-color-error);
}

/* ============================================
   FORM INPUTS (44px+ Touch Target)
   ============================================ */
.signup-input-wrap {
    position: relative;
}

.signup-input {
    width: 100%;
    height: 44px;
    padding: 0 var(--signup-space-3);
    font-size: 0.9375rem;
    font-family: inherit;
    color: var(--signup-color-text);
    background: var(--signup-color-card);
    border: 1.5px solid var(--signup-color-border);
    border-radius: var(--signup-radius-sm);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    -webkit-appearance: none;
    appearance: none;
    box-sizing: border-box;
}

.signup-input:hover {
    border-color: #d1d5db;
}

.signup-input:focus {
    outline: none;
    border-color: var(--signup-color-border-focus);
    box-shadow: 0 0 0 3px rgba(197, 160, 137, 0.2);
}

.signup-input::placeholder {
    color: #9ca3af;
}

.signup-input--error {
    border-color: var(--signup-color-error);
}

.signup-input--error:focus {
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.15);
}

/* Password Input with Toggle */
.signup-input--password {
    padding-right: 48px;
}

.signup-password-toggle {
    position: absolute;
    right: 4px;
    top: 50%;
    transform: translateY(-50%);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--signup-color-text-muted);
    border-radius: var(--signup-radius-sm);
    transition: color 0.2s ease, background 0.2s ease;
}

.signup-password-toggle:hover {
    color: var(--signup-color-primary);
    background: rgba(26, 60, 52, 0.05);
}

.signup-password-toggle:focus {
    outline: 2px solid var(--signup-color-border-focus);
    outline-offset: 2px;
}

.signup-password-toggle i {
    font-size: 14px;
}

/* Phone Input */
.signup-phone-wrap {
    display: flex;
    align-items: stretch;
}

.signup-phone-code {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    background: var(--signup-color-bg);
    border: 1.5px solid var(--signup-color-border);
    border-right: none;
    border-radius: var(--signup-radius-sm) 0 0 var(--signup-radius-sm);
    font-weight: 600;
    color: var(--signup-color-text-muted);
    font-size: 0.8125rem;
}

.signup-phone-input {
    flex: 1;
    border-radius: 0 var(--signup-radius-sm) var(--signup-radius-sm) 0 !important;
}

/* ============================================
   ERROR MESSAGES
   ============================================ */
.signup-error {
    display: flex;
    align-items: center;
    gap: var(--signup-space-2);
    font-size: 0.8125rem;
    color: var(--signup-color-error);
    margin-top: var(--signup-space-1);
}

.signup-error i {
    font-size: 12px;
}

/* ============================================
   PASSWORD STRENGTH - Compact
   ============================================ */
.signup-password-rules {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 12px;
    margin-top: 4px;
}

.signup-password-rule {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.6875rem;
    color: var(--signup-color-text-muted);
    transition: color 0.2s ease;
}

.signup-password-rule i {
    font-size: 5px;
}

.signup-password-rule--valid {
    color: var(--signup-color-success);
}

.signup-password-rule--valid i::before {
    content: "\f00c";
}

.signup-password-strength {
    display: flex;
    gap: 3px;
    margin-top: 4px;
}

.signup-strength-bar {
    flex: 1;
    height: 3px;
    background: var(--signup-color-border);
    border-radius: 2px;
    transition: background 0.3s ease;
}

.signup-strength-bar--weak { background: #ef4444; }
.signup-strength-bar--fair { background: #f59e0b; }
.signup-strength-bar--good { background: #22c55e; }
.signup-strength-bar--strong { background: #16a34a; }

/* ============================================
   SUBMIT BUTTON (44px Touch Target)
   ============================================ */
.signup-submit {
    width: 100%;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--signup-space-2);
    padding: 0 var(--signup-space-5);
    font-size: 0.9375rem;
    font-weight: 600;
    font-family: inherit;
    color: #ffffff;
    background: var(--signup-color-primary);
    border: none;
    border-radius: var(--signup-radius-sm);
    cursor: pointer;
    transition: background 0.2s ease, transform 0.1s ease, box-shadow 0.2s ease;
    margin-top: var(--signup-space-3);
}

.signup-submit:hover:not(:disabled) {
    background: var(--signup-color-primary-dark);
    box-shadow: 0 4px 12px rgba(26, 60, 52, 0.3);
}

.signup-submit:active:not(:disabled) {
    transform: translateY(1px);
}

.signup-submit:focus {
    outline: 2px solid var(--signup-color-border-focus);
    outline-offset: 2px;
}

.signup-submit:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.signup-submit i {
    font-size: 12px;
}

/* ============================================
   TRUST SIGNALS - Compact
   ============================================ */
.signup-trust {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-top: var(--signup-space-3);
    padding-top: var(--signup-space-3);
    border-top: 1px solid var(--signup-color-border);
    font-size: 0.75rem;
    color: var(--signup-color-text-muted);
}

.signup-trust i {
    color: var(--signup-color-success);
    font-size: 12px;
}

/* ============================================
   FOOTER - Compact
   ============================================ */
.signup-footer {
    text-align: center;
    padding-top: var(--signup-space-3);
    margin-top: var(--signup-space-3);
    border-top: 1px solid var(--signup-color-border);
}

.signup-footer p {
    font-size: 0.875rem;
    color: var(--signup-color-text-muted);
    margin: 0;
}

.signup-footer a {
    color: var(--signup-color-primary);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s ease;
}

.signup-footer a:hover {
    color: var(--signup-color-accent);
    text-decoration: underline;
}

.signup-footer a:focus {
    outline: 2px solid var(--signup-color-border-focus);
    outline-offset: 2px;
    border-radius: 2px;
}

/* ============================================
   RESPONSIVE DESIGN - Single Screen Optimized
   ============================================ */

/* Laptop 1366x768 optimization */
@media (max-height: 800px) {
    .signup-page {
        padding: var(--signup-space-3) var(--signup-space-4);
    }
    
    .signup-header {
        padding: var(--signup-space-3) var(--signup-space-4);
    }
    
    .signup-icon-wrap {
        width: 40px;
        height: 40px;
        margin-bottom: 6px;
    }
    
    .signup-icon-wrap i {
        font-size: 16px;
    }
    
    .signup-header h1 {
        font-size: 1.25rem;
    }
    
    .signup-header p {
        font-size: 0.75rem;
    }
    
    .signup-body {
        padding: var(--signup-space-4);
    }
    
    .signup-form {
        gap: 10px;
    }
    
    .signup-input {
        height: 40px;
    }
    
    .signup-submit {
        height: 40px;
        margin-top: 10px;
    }
    
    .signup-trust {
        margin-top: 10px;
        padding-top: 10px;
    }
    
    .signup-footer {
        margin-top: 10px;
        padding-top: 10px;
    }
}

/* Tablet */
@media (max-width: 768px) {
    .signup-page {
        padding: var(--signup-space-3) var(--signup-space-3);
    }
    
    .signup-header {
        padding: var(--signup-space-3) var(--signup-space-4);
    }
    
    .signup-body {
        padding: var(--signup-space-4);
    }
    
    .signup-form__row {
        grid-template-columns: 1fr 1fr;
        gap: var(--signup-space-3);
    }
}

/* Mobile */
@media (max-width: 480px) {
    .signup-page {
        padding: var(--signup-space-2) var(--signup-space-2);
        min-height: calc(100vh - 100px);
    }
    
    .signup-card {
        border-radius: var(--signup-radius-sm);
    }
    
    .signup-header {
        padding: var(--signup-space-3);
    }
    
    .signup-header h1 {
        font-size: 1.125rem;
    }
    
    .signup-icon-wrap {
        width: 36px;
        height: 36px;
        margin-bottom: 4px;
    }
    
    .signup-icon-wrap i {
        font-size: 14px;
    }
    
    .signup-body {
        padding: var(--signup-space-3);
    }
    
    .signup-form {
        gap: 8px;
    }
    
    .signup-form__row {
        grid-template-columns: 1fr;
        gap: 8px;
    }
    
    .signup-form__group {
        gap: 2px;
    }
    
    .signup-label {
        font-size: 0.75rem;
    }
    
    .signup-input {
        height: 42px;
        font-size: 0.875rem;
    }
    
    /* Mobile password input fixes */
    .signup-input-wrap {
        position: relative;
        z-index: 1;
    }
    
    .signup-input--password {
        position: relative;
        z-index: 2;
        -webkit-transform: translateZ(0);
        transform: translateZ(0);
        padding-right: 40px !important;
        -webkit-user-select: text !important;
        user-select: text !important;
        pointer-events: auto !important;
    }
    
    .signup-password-toggle {
        z-index: 3;
        pointer-events: auto;
        -webkit-tap-highlight-color: transparent;
        width: 32px !important;
        height: 32px !important;
        right: 2px !important;
        background: rgba(255, 255, 255, 0.95) !important;
        border-radius: 4px !important;
    }
    
    .signup-password-toggle i {
        font-size: 12px !important;
        pointer-events: none;
    }
    
    .signup-submit {
        height: 42px;
        margin-top: 8px;
    }
    
    .signup-trust {
        margin-top: 8px;
        padding-top: 8px;
        font-size: 0.6875rem;
    }
    
    .signup-footer {
        margin-top: 8px;
        padding-top: 8px;
    }
    
    .signup-footer p {
        font-size: 0.8125rem;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    .signup-input {
        border-width: 3px;
    }
    
    .signup-submit {
        border: 2px solid #ffffff;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    .signup-input,
    .signup-submit,
    .signup-password-toggle,
    .signup-strength-bar {
        transition: none;
    }
}

/* RTL Support */
[dir="rtl"] .signup-password-toggle {
    right: auto;
    left: var(--signup-space-2);
}

[dir="rtl"] .signup-input--password {
    padding-right: var(--signup-space-4);
    padding-left: 48px;
}

[dir="rtl"] .signup-phone-code {
    border-right: 2px solid var(--signup-color-border);
    border-left: none;
    border-radius: 0 var(--signup-radius-md) var(--signup-radius-md) 0;
}

[dir="rtl"] .signup-phone-input {
    border-radius: var(--signup-radius-md) 0 0 var(--signup-radius-md) !important;
}