/* ========================================
   VersionBear Waitlist - Premium Styles
   A handcrafted, modern design system
   ======================================== */

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

:root {
    /* Primary Brand Colors - Deep Ocean & Amber */
    --color-primary: #f59e0b;
    --color-primary-light: #fbbf24;
    --color-primary-dark: #d97706;
    --color-primary-glow: rgba(245, 158, 11, 0.4);
    
    /* Deep Background Colors */
    --color-bg-deep: #0f172a;
    --color-bg-navy: #1e293b;
    --color-bg-slate: #334155;
    --color-bg-card: rgba(30, 41, 59, 0.7);
    --color-bg-card-hover: rgba(51, 65, 85, 0.8);
    
    /* Text Colors */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    /* Accent Colors */
    --color-accent-purple: #8b5cf6;
    --color-accent-blue: #3b82f6;
    --color-accent-teal: #14b8a6;
    
    /* Status Colors */
    --color-success: #10b981;
    --color-success-bg: rgba(16, 185, 129, 0.15);
    --color-error: #ef4444;
    --color-error-bg: rgba(239, 68, 68, 0.15);
    
    /* Borders & Shadows */
    --border-subtle: rgba(148, 163, 184, 0.1);
    --border-medium: rgba(148, 163, 184, 0.2);
    --border-highlight: rgba(245, 158, 11, 0.3);
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(245, 158, 11, 0.15);
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

/* Body & Background */
body {
    font-family: var(--font-sans);
    background-color: var(--color-bg-deep);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Animated Background Layers */
.bg-gradient {
    position: fixed;
    inset: 0;
    background: 
        radial-gradient(ellipse 80% 50% at 20% 0%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse 60% 40% at 80% 20%, rgba(139, 92, 246, 0.12) 0%, transparent 50%),
        radial-gradient(ellipse 70% 50% at 50% 80%, rgba(245, 158, 11, 0.08) 0%, transparent 50%),
        linear-gradient(180deg, var(--color-bg-deep) 0%, #1a1f3a 100%);
    z-index: -3;
}

.bg-mesh {
    position: fixed;
    inset: 0;
    z-index: -2;
    overflow: hidden;
}

.mesh-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 20s ease-in-out infinite;
}

.mesh-orb-1 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(245, 158, 11, 0.3) 0%, transparent 70%);
    top: -100px;
    right: -100px;
    animation-delay: 0s;
}

.mesh-orb-2 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.25) 0%, transparent 70%);
    bottom: 20%;
    left: -100px;
    animation-delay: -7s;
}

.mesh-orb-3 {
    width: 250px;
    height: 250px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.2) 0%, transparent 70%);
    top: 50%;
    right: 10%;
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -30px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(20px, 30px) scale(1.02); }
}

.bg-pattern {
    position: fixed;
    inset: 0;
    background-image: 
        linear-gradient(var(--border-subtle) 1px, transparent 1px),
        linear-gradient(90deg, var(--border-subtle) 1px, transparent 1px);
    background-size: 60px 60px;
    background-position: 0 0;
    opacity: 0.5;
    z-index: -1;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 0%, transparent 70%);
}

/* Container */
.container {
    max-width: 760px;
    margin: 0 auto;
    padding: var(--space-xl) var(--space-lg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
}

/* ========================================
   Header Section
   ======================================== */
header {
    text-align: center;
    padding: var(--space-2xl) 0 var(--space-2xl);
    animation: fadeInDown 800ms var(--transition-bounce) both;
}

.logo-wrapper {
    position: relative;
    display: inline-block;
    margin-bottom: var(--space-lg);
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
    position: relative;
    z-index: 1;
}

.logo-icon {
    position: relative;
}

.logo-img {
    height: 72px;
    width: auto;
    filter: drop-shadow(0 4px 12px rgba(245, 158, 11, 0.3));
    transition: filter var(--transition-base), transform var(--transition-base);
}

.logo-icon:hover .logo-img {
    filter: drop-shadow(0 8px 24px rgba(245, 158, 11, 0.5));
    transform: scale(1.05);
}

.logo-text h1 {
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
    position: relative;
    display: inline-block;
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 50%, var(--color-accent-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.gradient-text::after {
    content: attr(data-text);
    position: absolute;
    left: 0;
    top: 0;
    background: radial-gradient(ellipse 80% 60% at 50% 50%, rgba(245, 158, 11, 0.25) 0%, transparent 70%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: blur(20px);
    z-index: -1;
}

.tagline {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.header-subtitle {
    color: var(--text-muted);
    font-size: 1.05rem;
    max-width: 420px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ========================================
   Main Content - Waitlist Cards
   ======================================== */
main {
    flex: 1;
}

.waitlist-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.waitlist-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    padding: var(--space-lg) var(--space-xl);
    border: 1px solid var(--border-subtle);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-lg);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    animation: fadeInUp 500ms var(--transition-bounce) both;
    animation-fill-mode: both;
}

.waitlist-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, 
        var(--color-primary) 0%, 
        var(--color-accent-purple) 50%, 
        var(--color-accent-blue) 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.waitlist-card::after {
    content: '';
    position: absolute;
    inset: -2px;
    background: linear-gradient(135deg, 
        rgba(245, 158, 11, 0.15), 
        rgba(139, 92, 246, 0.1), 
        rgba(59, 130, 246, 0.1));
    border-radius: inherit;
    z-index: -1;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.waitlist-card:hover {
    transform: translateY(-4px) scale(1.01);
    border-color: var(--border-highlight);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.waitlist-card:hover::before {
    opacity: 1;
}

.waitlist-card:hover::after {
    opacity: 1;
}

.waitlist-info {
    flex: 1;
    min-width: 0;
}

.waitlist-info h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
    letter-spacing: -0.01em;
}

.waitlist-info p {
    color: var(--text-secondary);
    font-size: 0.925rem;
    line-height: 1.6;
}

.join-btn {
    flex-shrink: 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-bg-deep);
    border: none;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    font-size: 0.925rem;
    font-weight: 600;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.join-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.join-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(245, 158, 11, 0.4);
}

.join-btn:hover::before {
    opacity: 1;
}

.join-btn:active {
    transform: translateY(0) scale(0.98);
}

/* Stagger animations for cards */
.waitlist-card:nth-child(1) { animation-delay: 100ms; }
.waitlist-card:nth-child(2) { animation-delay: 200ms; }
.waitlist-card:nth-child(3) { animation-delay: 300ms; }
.waitlist-card:nth-child(4) { animation-delay: 400ms; }
.waitlist-card:nth-child(5) { animation-delay: 500ms; }

/* ========================================
   Empty State
   ======================================== */
.empty-state {
    text-align: center;
    padding: var(--space-2xl) var(--space-lg);
    background: var(--color-bg-card);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-subtle);
    animation: fadeInUp 600ms var(--transition-bounce) both;
}

.empty-illustration {
    position: relative;
    display: inline-block;
    margin-bottom: var(--space-lg);
}

.empty-icon {
    font-size: 4.5rem;
    display: block;
    animation: emptyFloat 4s ease-in-out infinite;
}

@keyframes emptyFloat {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-12px) rotate(5deg); }
}

.empty-decoration {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    background: radial-gradient(circle, rgba(245, 158, 11, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: pulse-glow 3s ease-in-out infinite;
}

.empty-state h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
    letter-spacing: -0.01em;
}

.empty-state p {
    color: var(--text-secondary);
    font-size: 0.975rem;
    line-height: 1.7;
    max-width: 380px;
    margin: 0 auto;
}

/* ========================================
   Footer
   ======================================== */
footer {
    text-align: center;
    padding: var(--space-2xl) 0 var(--space-lg);
    border-top: 1px solid var(--border-subtle);
    margin-top: auto;
}

.footer-content {
    position: relative;
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
    color: var(--text-secondary);
    font-weight: 500;
}

.footer-brand a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-base);
    position: relative;
}

.footer-brand a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-primary);
    transition: width var(--transition-base);
}

.footer-brand a:hover {
    color: var(--color-primary);
}

.footer-brand a:hover::after {
    width: 100%;
}

.footer-logo {
    height: 24px;
    width: auto;
    opacity: 0.8;
    transition: opacity var(--transition-base);
}

.footer-brand:hover .footer-logo {
    opacity: 1;
}

.footer-text {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.footer-decoration {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 1px;
    background: linear-gradient(90deg, 
        transparent, 
        var(--border-medium), 
        transparent);
}

/* ========================================
   Modal Styles
   ======================================== */
.modal {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: var(--space-lg);
}

.modal.hidden {
    display: none;
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(2, 6, 23, 0.85);
    backdrop-filter: blur(8px);
    animation: fadeIn 200ms var(--transition-base) both;
}

.modal-content {
    position: relative;
    background: linear-gradient(180deg, 
        rgba(30, 41, 59, 0.98) 0%, 
        rgba(15, 23, 42, 0.98) 100%);
    backdrop-filter: blur(40px);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    width: 100%;
    max-width: 460px;
    max-height: 90vh;
    overflow-y: auto;
    border: 1px solid var(--border-medium);
    box-shadow: var(--shadow-lg), 0 0 0 1px rgba(245, 158, 11, 0.1);
    animation: modalSlideIn 400ms var(--transition-bounce) both;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-close {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    background: rgba(148, 163, 184, 0.1);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition-base);
}

.modal-close:hover {
    background: rgba(148, 163, 184, 0.2);
    color: var(--text-primary);
    border-color: var(--border-medium);
}

.modal-header {
    text-align: center;
    margin-bottom: var(--space-lg);
}

.modal-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto var(--space-md);
    background: linear-gradient(135deg, 
        rgba(245, 158, 11, 0.2) 0%, 
        rgba(139, 92, 246, 0.15) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
}

.modal-content h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.modal-description {
    color: var(--text-secondary);
    text-align: center;
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: var(--space-xl);
}

/* ========================================
   Form Styles
   ======================================== */
.signup-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.form-group label {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group label svg {
    color: var(--text-muted);
    flex-shrink: 0;
}

.form-group .optional {
    color: var(--text-muted);
    font-weight: 400;
    font-size: 0.8rem;
}

.input-wrapper {
    position: relative;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--space-md);
    background: rgba(2, 6, 23, 0.5);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-family: var(--font-sans);
    color: var(--text-primary);
    transition: all var(--transition-base);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group input:hover,
.form-group textarea:hover {
    border-color: var(--border-medium);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.15);
    background: rgba(2, 6, 23, 0.7);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

/* Submit Button */
.submit-btn {
    position: relative;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-bg-deep);
    border: none;
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: all var(--transition-base);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    min-height: 52px;
}

.submit-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.submit-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(245, 158, 11, 0.4);
}

.submit-btn:hover:not(:disabled)::before {
    opacity: 1;
}

.submit-btn:active:not(:disabled) {
    transform: translateY(0) scale(0.98);
}

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

.btn-text,
.btn-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
}

.btn-loading {
    display: none;
}

.submit-btn:disabled .btn-text {
    display: none;
}

.submit-btn:disabled .btn-loading {
    display: flex;
}

.spinner-circle {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { stroke-dashoffset: 60; transform: rotate(0deg); }
    to { stroke-dashoffset: 0; transform: rotate(360deg); }
}

/* Form Status Messages */
.form-status {
    padding: var(--space-md);
    border-radius: var(--radius-md);
    text-align: center;
    font-size: 0.9rem;
    font-weight: 500;
    animation: fadeInUp 300ms var(--transition-base) both;
}

.form-status.hidden {
    display: none;
}

.form-status.success {
    background: var(--color-success-bg);
    color: var(--color-success);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.form-status.error {
    background: var(--color-error-bg);
    color: var(--color-error);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

/* ========================================
   Animations
   ======================================== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 640px) {
    .container {
        padding: var(--space-lg) var(--space-md);
    }
    
    header {
        padding: var(--space-xl) 0;
    }
    
    .logo {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .logo-img {
        height: 56px;
    }
    
    .logo-text h1 {
        font-size: 1.75rem;
    }
    
    .tagline {
        font-size: 0.875rem;
    }
    
    .header-subtitle {
        font-size: 0.95rem;
    }
    
    .waitlist-card {
        flex-direction: column;
        text-align: center;
        padding: var(--space-lg);
        gap: var(--space-md);
    }
    
    .join-btn {
        width: 100%;
        padding: var(--space-md);
    }
    
    .modal-content {
        padding: var(--space-xl);
        margin: var(--space-md);
    }
    
    .modal-content h2 {
        font-size: 1.35rem;
    }
}

@media (max-width: 400px) {
    .logo-img {
        height: 48px;
    }
    
    .logo-text h1 {
        font-size: 1.5rem;
    }
    
    .empty-icon {
        font-size: 3.5rem;
    }
}

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

/* Focus visible styles */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-subtle: rgba(245, 158, 11, 0.5);
        --border-medium: rgba(245, 158, 11, 0.7);
    }
}