/*
  ULTRA PREMIUM AUTH DESIGN
  Next-level authentication pages with glassmorphism, 3D effects, and advanced animations
*/

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
    /* Calm Blue Color Palette */
    --bg-primary: #0f1419;
    --bg-secondary: #1a2332;
    --bg-tertiary: #243447;
    --bg-glass: rgba(255, 255, 255, 0.03);
    --bg-glass-hover: rgba(255, 255, 255, 0.06);
    
    /* Soft Blue Gradients */
    --gradient-primary: linear-gradient(135deg, #4a90e2 0%, #7bb3f0 100%);
    --gradient-secondary: linear-gradient(135deg, #5dade2 0%, #85c1e9 100%);
    --gradient-accent: linear-gradient(135deg, #3498db 0%, #5dade2 100%);
    --gradient-success: linear-gradient(135deg, #52c4b0 0%, #4a90e2 100%);
    
    /* Glass Effects */
    --glass-border: rgba(116, 185, 255, 0.2);
    --glass-shadow: 0 8px 32px 0 rgba(74, 144, 226, 0.15);
    --glass-backdrop: blur(20px);
    
    /* Soft Shadows */
    --shadow-3d: 0 10px 25px rgba(0, 0, 0, 0.2), 0 6px 10px rgba(0, 0, 0, 0.15);
    --shadow-3d-hover: 0 15px 35px rgba(0, 0, 0, 0.25), 0 10px 15px rgba(0, 0, 0, 0.2);
    --shadow-neon: 0 0 15px rgba(74, 144, 226, 0.3);
    
    /* Typography */
    --text-primary: #ffffff;
    --text-secondary: #e8f4fd;
    --text-muted: #a0b4cc;
    --text-accent: #4a90e2;
    
    /* Spacing & Sizing */
    --border-radius: 20px;
    --border-radius-lg: 24px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
}

/* Calm Static Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 20%, rgba(74, 144, 226, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(93, 173, 226, 0.12) 0%, transparent 40%),
        linear-gradient(135deg, rgba(52, 152, 219, 0.05) 0%, rgba(116, 185, 255, 0.08) 100%);
    z-index: -2;
}

/* Subtle Static Orbs */
.floating-orbs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

.orb {
    position: absolute;
    border-radius: 50%;
    background: var(--gradient-primary);
    filter: blur(60px);
    opacity: 0.4;
}

.orb:nth-child(1) {
    width: 200px;
    height: 200px;
    top: 15%;
    left: 15%;
    background: var(--gradient-primary);
}

.orb:nth-child(2) {
    width: 150px;
    height: 150px;
    top: 65%;
    right: 15%;
    background: var(--gradient-secondary);
}

.orb:nth-child(3) {
    width: 120px;
    height: 120px;
    bottom: 25%;
    left: 45%;
    background: var(--gradient-accent);
}

/* Main Container */
.auth-container {
    display: flex;
    min-height: 100vh;
    position: relative;
    z-index: 1;
}

/* Left Hero Section */
.auth-hero {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    position: relative;
    background: linear-gradient(135deg, 
        rgba(74, 144, 226, 0.05) 0%, 
        rgba(93, 173, 226, 0.03) 100%);
}

.hero-content {
    max-width: 520px;
    width: 100%;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--bg-glass);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    backdrop-filter: var(--glass-backdrop);
    margin-bottom: var(--spacing-lg);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-accent);
    box-shadow: var(--shadow-neon);
}

.hero-title {
    font-size: clamp(2.8rem, 5vw, 4.2rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: var(--spacing-xl);
    opacity: 0;
    animation: fade-in-up 1s ease-out 0.5s forwards;
    font-weight: 400;
    max-width: 90%;
}

@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(40px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.hero-features {
    display: flex;
    flex-direction: row;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
    justify-content: space-between;
}

.feature-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    background: var(--bg-glass);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-lg);
    backdrop-filter: var(--glass-backdrop);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    flex: 1;
    min-width: 200px;
    max-width: 280px;
    opacity: 0;
    animation: fade-in-up 0.8s ease-out forwards;
}

.feature-item:nth-child(1) {
    animation-delay: 1s;
}

.feature-item:nth-child(2) {
    animation-delay: 1.2s;
}

.feature-item:hover {
    background: var(--bg-glass-hover);
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.25), var(--shadow-neon);
    border-color: var(--text-accent);
}

.feature-item strong {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.feature-item small {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.4;
    opacity: 0.9;
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: var(--gradient-primary);
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: var(--spacing-sm);
    box-shadow: var(--shadow-neon);
}

/* Right Form Section */
.auth-form {
    flex: 0 0 480px;
    background: var(--bg-glass);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-lg);
    backdrop-filter: var(--glass-backdrop);
    padding: var(--spacing-xl);
    box-shadow: var(--glass-shadow);
    position: relative;
    overflow: hidden;
    animation: slide-in-right 1s ease-out;
    min-height: 600px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

@keyframes slide-in-right {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Auth Header */
.auth-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-bottom: 1px solid var(--glass-border);
    background: rgba(255, 255, 255, 0.02);
    margin: calc(-1 * var(--spacing-xl)) calc(-1 * var(--spacing-xl)) var(--spacing-xl) calc(-1 * var(--spacing-xl));
}

.auth-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: var(--gradient-primary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.auth-nav {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    padding: var(--spacing-xs) var(--spacing-md);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
}

.nav-link:hover {
    color: var(--text-accent);
    background: var(--bg-glass-hover);
}

.form-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-primary);
    opacity: 0.5;
}

/* Logo & Branding */
.brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

.brand-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: var(--shadow-neon);
}

.brand-text {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Form Headers */
.form-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.form-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.form-subtitle {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Form Groups */
.form-group {
    margin-bottom: var(--spacing-lg);
}

/* Form Labels */
.form-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xs);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.label-icon {
    width: 16px;
    height: 16px;
    color: var(--text-accent);
}

/* Custom Checkbox */
.checkbox-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    cursor: pointer;
    font-size: 0.9rem;
}

.checkbox-container input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.checkmark {
    height: 18px;
    width: 18px;
    background: var(--bg-glass);
    border: 1.5px solid var(--glass-border);
    border-radius: 4px;
    position: relative;
    transition: all 0.3s ease;
    backdrop-filter: var(--glass-backdrop);
}

.checkbox-container:hover .checkmark {
    border-color: var(--text-accent);
    background: var(--bg-glass-hover);
}

.checkbox-container input:checked ~ .checkmark {
    background: var(--gradient-primary);
    border-color: var(--text-accent);
}

.checkmark:after {
    content: "";
    position: absolute;
    display: none;
    left: 5px;
    top: 2px;
    width: 4px;
    height: 8px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-container input:checked ~ .checkmark:after {
    display: block;
}

.checkbox-text {
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.3s ease;
}

.checkbox-container:hover .checkbox-text {
    color: var(--text-primary);
}

/* Form Inputs */
.form-input {
    width: 100%;
    padding: 1.2rem 1.5rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1.5px solid var(--glass-border);
    border-radius: 16px;
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 500;
    backdrop-filter: blur(20px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    outline: none;
    box-shadow: 
        0 4px 20px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.form-input::placeholder {
    color: var(--text-muted);
    font-weight: 400;
    opacity: 0.7;
}

.form-input:focus {
    border-color: var(--text-accent);
    box-shadow: 
        0 0 0 4px rgba(74, 144, 226, 0.15),
        0 8px 30px rgba(74, 144, 226, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-2px);
}

/* Input with floating label effect */
.input-floating {
    position: relative;
}

.input-floating .form-input:focus + .floating-label,
.input-floating .form-input:not(:placeholder-shown) + .floating-label {
    transform: translateY(-28px) scale(0.85);
    color: var(--text-accent);
    background: rgba(15, 20, 25, 0.9);
    border: 1.5px solid var(--glass-border);
    backdrop-filter: blur(20px);
    box-shadow: 
        0 4px 20px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.input-floating .form-input:focus + .floating-label {
    border-color: var(--text-accent);
    background: rgba(15, 20, 25, 0.95);
    box-shadow: 
        0 0 0 4px rgba(74, 144, 226, 0.15),
        0 8px 30px rgba(74, 144, 226, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.floating-label {
    position: absolute;
    left: 1.25rem;
    top: 1rem;
    color: var(--text-muted);
    font-size: 1rem;
    font-weight: 500;
    pointer-events: none;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    background: transparent;
    border: 1.5px solid transparent;
    padding: 0.25rem 0.5rem;
    border-radius: 8px;
    backdrop-filter: none;
}


/* Special Code Input */
.code-input {
    text-align: center;
    font-size: 1.5rem;
    letter-spacing: 0.5em;
    font-weight: 700;
    background: linear-gradient(135deg, var(--bg-glass), rgba(0, 245, 255, 0.05));
    border: 2px solid var(--text-accent);
    box-shadow: var(--shadow-neon);
}

/* Premium Buttons */
.btn {
    width: 100%;
    padding: 1.25rem 2rem;
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--border-radius);
    color: var(--bg-primary);
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-3d);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.5s ease;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-3d-hover);
    filter: brightness(1.1);
}

.btn:hover::before {
    left: 100%;
}

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

/* Secondary Button */
.btn-secondary {
    background: var(--bg-glass);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    backdrop-filter: var(--glass-backdrop);
}

.btn-secondary:hover {
    background: var(--bg-glass-hover);
    border-color: var(--text-accent);
}

/* Back Buttons */
.btn-back {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 1rem 1.5rem;
    background: var(--bg-glass);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: var(--glass-backdrop);
    flex: 0 0 auto;
}

.btn-back:hover {
    background: var(--bg-glass-hover);
    border-color: var(--text-accent);
    color: var(--text-primary);
    transform: translateX(-2px);
}

.btn-back svg {
    transition: transform 0.3s ease;
}

.btn-back:hover svg {
    transform: translateX(-2px);
}

.btn-back-minimal {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: var(--border-radius);
}

.btn-back-minimal:hover {
    color: var(--text-accent);
    background: var(--bg-glass);
    transform: translateX(-2px);
}

.btn-back-minimal svg {
    transition: transform 0.3s ease;
}

.btn-back-minimal:hover svg {
    transform: translateX(-2px);
}

/* Messages */
.message {
    padding: 1rem 1.25rem;
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
    font-size: 0.9rem;
    font-weight: 500;
    animation: slide-in-down 0.5s ease-out;
    position: relative;
    overflow: hidden;
}

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

.message::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: currentColor;
}

.message-success {
    background: rgba(79, 172, 254, 0.1);
    border: 1px solid rgba(79, 172, 254, 0.3);
    color: #4facfe;
}

.message-error {
    background: rgba(245, 87, 108, 0.1);
    border: 1px solid rgba(245, 87, 108, 0.3);
    color: #f5576c;
}

/* Divider */
.divider {
    display: flex;
    align-items: center;
    margin: var(--spacing-lg) 0;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--glass-border);
}

.divider span {
    padding: 0 var(--spacing-md);
}

/* Helper Text */
.helper-text {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.5;
}

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

.helper-text a:hover {
    color: var(--text-primary);
    text-shadow: 0 0 10px var(--text-accent);
}

/* Step Indicator */
.step-indicator {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

.step {
    flex: 1;
    height: 4px;
    background: var(--glass-border);
    border-radius: 2px;
    transition: all 0.3s ease;
    position: relative;
}

.step.active {
    background: var(--gradient-primary);
    box-shadow: 0 0 10px rgba(0, 245, 255, 0.5);
}

.step.completed {
    background: var(--gradient-success);
}

/* Multi-step form animations */
.form-step {
    opacity: 0;
    transform: translateX(30px);
    transition: all 0.4s ease;
    position: absolute;
    width: 100%;
    top: 0;
    left: 0;
}

.form-step.active {
    opacity: 1;
    transform: translateX(0);
    position: relative;
}

.form-step.prev {
    transform: translateX(-30px);
}

.form-steps-container {
    position: relative;
    min-height: 300px;
}

/* Loading State */
.loading .btn {
    pointer-events: none;
    opacity: 0.8;
}

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

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

/* Responsive Design */
@media (max-width: 1400px) {
    .auth-form {
        flex: 0 0 650px;
    }
}

@media (max-width: 1200px) {
    .auth-form {
        flex: 0 0 580px;
    }
    
    .form-container {
        max-width: 550px;
    }
}

@media (max-width: 1024px) {
    .auth-form {
        flex: 0 0 520px;
    }
    
    .form-container {
        max-width: 480px;
    }
}

@media (max-width: 768px) {
    .auth-container {
        flex-direction: column;
    }
    
    .auth-hero {
        flex: none;
        min-height: auto;
        padding: var(--spacing-lg);
    }
    
    .auth-form {
        flex: none;
        padding: 0;
        border-left: none;
        border-top: 1px solid var(--glass-border);
    }
    
    .auth-header {
        margin: 0;
        padding: var(--spacing-md) var(--spacing-lg);
        border-bottom: 1px solid var(--glass-border);
    }
    
    .auth-nav {
        gap: var(--spacing-sm);
    }
    
    .nav-link {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.85rem;
    }
    
    .form-container {
        padding: var(--spacing-lg);
    }
    
    .hero-features {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .feature-item {
        flex-direction: row;
        text-align: left;
        gap: var(--spacing-md);
        padding: var(--spacing-md);
        min-width: auto;
        max-width: none;
    }
    
    .feature-icon {
        width: 48px;
        height: 48px;
        font-size: 20px;
        flex-shrink: 0;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .step-indicator {
        margin: var(--spacing-md) 0;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Dark mode enhancements */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #000000;
        --bg-secondary: #111111;
    }
}
/* Optional hint styling for form labels */
.optional-hint {
  opacity: 0.6;
  font-size: 0.9rem;
  margin-left: 6px;
}

/* Hide spinners for numeric inputs (day/year) */
.form-input[type="number"]::-webkit-outer-spin-button,
.form-input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.form-input[type="number"] {
  -moz-appearance: textfield;
}
/* Password visibility toggle */
.password-field { position: relative; }
.password-toggle {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 6px;
  line-height: 0;
}
.password-toggle:hover { color: var(--text-primary); }