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

:root {
    /* Dark Color Palette */
    --bg-primary: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --text-muted: #808080;
    --accent-primary: #3b82f6;
    --accent-secondary: #1d4ed8;
    --accent-hover: #2563eb;
    --success: #10b981;
    --error: #ef4444;
    --border: #404040;
    --border-focus: var(--accent-primary);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    min-height: 100vh;
    overflow-x: hidden;
}


/* Screen Reader Only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Container */
.container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
    position: relative;
}

.content-wrapper {
    max-width: 600px;
    width: 100%;
    text-align: center;
    animation: fadeInUp 0.8s ease-out;
}

/* Header */
.header {
    margin-bottom: var(--space-12);
}

.headline {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-6);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: slideInDown 0.8s ease-out 0.2s both;
}

.subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    font-weight: 400;
    line-height: 1.6;
    max-width: 500px;
    margin: 0 auto;
    animation: slideInUp 0.8s ease-out 0.4s both;
}

/* Email Section */
.email-section {
    margin-bottom: var(--space-8);
    animation: slideInUp 0.8s ease-out 0.6s both;
}

.email-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    max-width: 400px;
    margin: 0 auto;
}

.input-group {
    position: relative;
}

.input-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
    text-align: left;
}

.email-input {
    width: 100%;
    padding: var(--space-4);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    background: var(--bg-tertiary);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    transition: all var(--transition-normal);
    outline: none;
}

.email-input::placeholder {
    color: var(--text-muted);
}

.email-input:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    transform: translateY(-1px);
}

.email-input:invalid:not(:placeholder-shown) {
    border-color: var(--error);
}

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

.error-message {
    display: block;
    color: var(--error);
    font-size: var(--font-size-sm);
    margin-top: var(--space-2);
    text-align: left;
    min-height: 1.25rem;
}

.notify-btn {
    position: relative;
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-base);
    font-weight: 600;
    font-family: var(--font-family);
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    overflow: hidden;
    min-height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.notify-btn:hover {
    background: linear-gradient(135deg, var(--accent-hover) 0%, var(--accent-primary) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.notify-btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-md);
}

.notify-btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
}

.notify-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.btn-loading {
    display: none;
}

.notify-btn.loading .btn-text {
    display: none;
}

.notify-btn.loading .btn-loading {
    display: block;
}

.privacy-note {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-top: var(--space-4);
}

.privacy-link {
    color: var(--text-muted);
    text-decoration: underline;
    transition: all var(--transition-normal);
}

.privacy-link:hover {
    color: var(--text-secondary);
    text-decoration-color: var(--text-secondary);
}

.privacy-link:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
    border-radius: 2px;
}

/* Success Message */
.success-message {
    display: none;
    max-width: 400px;
    margin: 0 auto;
    animation: slideInUp 0.8s ease-out;
}

.success-message.show {
    display: block;
}

.success-content {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--success);
    border-radius: var(--radius-lg);
    color: var(--success);
}

.success-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

/* Social Media */
.social-media {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    z-index: 10;
}

.social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.social-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    opacity: 0;
    transition: opacity var(--transition-normal);
    z-index: -1;
}

.social-btn:hover {
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
}

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

.social-btn svg {
    width: 20px;
    height: 20px;
    transition: transform var(--transition-normal);
}

.social-btn:hover svg {
    transform: scale(1.1);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

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


/* Responsive Design */
@media (max-width: 768px) {
    .main-content {
        padding: var(--space-4);
    }
    
    .content-wrapper {
        width: 90%;
    }
    
    .headline {
        font-size: var(--font-size-4xl);
    }
    
    .subtitle {
        font-size: var(--font-size-base);
    }
    
    .email-form {
        max-width: 100%;
    }
    
    .email-input,
    .notify-btn {
        padding: var(--space-3) var(--space-4);
    }
}

@media (max-width: 480px) {
    .main-content {
        padding: var(--space-3);
    }
    
    .content-wrapper {
        width: 90%;
    }
    
    .headline {
        font-size: var(--font-size-5xl);
    }
    
    .header {
        margin-bottom: var(--space-8);
    }
    
    .email-section {
        margin-bottom: var(--space-6);
    }
    
    .social-media {
        bottom: var(--space-4);
        right: var(--space-4);
        gap: var(--space-2);
    }
    
    .social-btn {
        width: 40px;
        height: 40px;
    }
    
    .social-btn svg {
        width: 18px;
        height: 18px;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border: #666666;
        --text-secondary: #cccccc;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    body::before,
    body::after {
        animation: none !important;
    }
}

/* Focus visible for better keyboard navigation */
.notify-btn:focus-visible,
.email-input:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .email-form,
    .success-message {
        display: none;
    }
}