/**
 * Optigral Studio - Minimalist Premium Login Page
 * Clean, modern design with dark theme and blue accents
 */

/* CSS Variables - Matching Landing Page */
:root {
    /* Professional Color System */
    --color-primary-50: #eff6ff;
    --color-primary-100: #dbeafe;
    --color-primary-200: #bfdbfe;
    --color-primary-300: #93c5fd;
    --color-primary-400: #60a5fa;
    --color-primary-500: #3b82f6;
    --color-primary-600: #2563eb;
    --color-primary-700: #1d4ed8;
    --color-primary-800: #1e40af;
    --color-primary-900: #1e3a8a;

    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-accent: #8b5cf6;

    /* Neutral Scale */
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;

    /* Spacing Scale - 8pt Grid */
    --space-1: 0.25rem;   /* 4px */
    --space-2: 0.5rem;    /* 8px */
    --space-3: 0.75rem;   /* 12px */
    --space-4: 1rem;      /* 16px */
    --space-5: 1.25rem;   /* 20px */
    --space-6: 1.5rem;    /* 24px */
    --space-8: 2rem;      /* 32px */
    --space-10: 2.5rem;   /* 40px */
    --space-12: 3rem;     /* 48px */
    --space-16: 4rem;     /* 64px */

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);

    /* Dark Theme Colors */
    --color-background: #0a0b0d;
    --color-surface: #141518;
    --color-surface-elevated: #1f2023;
    --color-border: #2a2c30;
    --color-border-light: #3a3c42;
    --color-text-primary: #ffffff;
    --color-text-secondary: #a1a1a6;
    --color-text-muted: #6c6c70;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.8);
    --shadow: 0 4px 8px -2px rgba(0, 0, 0, 0.6);
    --shadow-lg: 0 12px 24px -4px rgba(0, 0, 0, 0.6);
    --shadow-xl: 0 24px 48px -8px rgba(0, 0, 0, 0.7);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Typography */
    --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: 2rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    
    /* Transitions */
    --transition: all 0.2s ease-in-out;
}

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

html {
    height: 100%;
}

.hidden {
    display: none !important;
}

body {
    font-family: var(--font-family);
    background: var(--color-background);
    color: var(--color-text-primary);
    min-height: 100vh;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow-x: hidden;
}

/* Beautiful Animated Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(600px circle at 20% 30%, rgba(59, 130, 246, 0.15), transparent 40%),
        radial-gradient(800px circle at 80% 70%, rgba(16, 185, 129, 0.1), transparent 40%),
        radial-gradient(400px circle at 40% 80%, rgba(139, 92, 246, 0.08), transparent 40%);
    animation: backgroundMove 20s ease-in-out infinite;
    z-index: -2;
}

body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(500px circle at 60% 20%, rgba(59, 130, 246, 0.12), transparent 40%),
        radial-gradient(700px circle at 20% 80%, rgba(16, 185, 129, 0.08), transparent 40%);
    animation: backgroundMove 25s ease-in-out infinite reverse;
    z-index: -1;
}

@keyframes backgroundMove {
    0%, 100% {
        transform: translate(0px, 0px) scale(1);
    }
    33% {
        transform: translate(30px, -30px) scale(1.1);
    }
    66% {
        transform: translate(-20px, 20px) scale(0.9);
    }
}

/* Navigation - Matching Landing Page */
.landing-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 11, 13, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-text-primary);
    text-decoration: none;
}

.nav-brand-icon {
    color: var(--color-primary-500);
    font-size: 1.5rem;
}

.nav-brand-text {
    color: var(--color-text-primary);
}

.nav-brand-logo {
    height: 56px;
    width: auto;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

/* Button Styles - Matching Landing Page */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius);
    font-weight: 600;
    text-decoration: none;
    font-size: 0.875rem;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--color-primary-600);
    color: white;
    box-shadow: var(--shadow);
}

.btn-primary:hover {
    background: var(--color-primary-700);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-surface);
    color: var(--color-text-primary);
    border-color: var(--color-primary-500);
    transform: translateX(-2px);
}

/* Main Content */
.main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
    min-height: calc(100vh - 64px);
    padding-top: calc(64px + var(--space-6));
}

.login-container {
    width: 100%;
    max-width: 450px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.login-card {
    width: 100%;
    background: rgba(31, 32, 35, 0.95);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 20px;
    padding: var(--space-12);
    box-shadow: 
        0 25px 50px rgba(0, 0, 0, 0.5),
        0 0 0 1px rgba(59, 130, 246, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(40px);
    position: relative;
    overflow: hidden;
}

.login-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, 
        transparent, 
        var(--color-primary-500), 
        var(--color-success), 
        var(--color-primary-500), 
        transparent
    );
    animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.8; }
}

/* Login Header */
.login-header {
    text-align: center;
    margin-bottom: var(--space-12);
}

.login-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--space-2);
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
}

.login-subtitle {
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
}

/* Form Styles */
.login-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form-label {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-primary);
}

.form-label i {
    color: var(--color-primary-500);
    font-size: var(--font-size-sm);
}

.form-input {
    width: 100%;
    padding: var(--space-4);
    background: rgba(10, 11, 13, 0.8);
    border: 2px solid rgba(42, 44, 48, 0.8);
    border-radius: 12px;
    color: var(--color-text-primary);
    font-size: var(--font-size-base);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary-500);
    box-shadow: 
        0 0 0 3px rgba(59, 130, 246, 0.2),
        0 0 20px rgba(59, 130, 246, 0.1);
    background: rgba(10, 11, 13, 0.95);
    transform: translateY(-1px);
}

.form-input:hover:not(:focus) {
    border-color: rgba(59, 130, 246, 0.3);
    transform: translateY(-0.5px);
}

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

.form-group {
    position: relative;
}

/* Form Validation */
.form-group.error .form-input {
    border-color: var(--color-error);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2);
}

.form-group.success .form-input {
    border-color: var(--color-success);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
}

.error-message {
    color: var(--color-error);
    font-size: var(--font-size-sm);
    margin-top: var(--space-2);
    display: none;
    align-items: center;
    gap: var(--space-2);
}

.error-message.show {
    display: flex;
}

.success-message {
    color: var(--color-success);
    font-size: var(--font-size-sm);
    margin-top: var(--space-2);
    display: none;
    align-items: center;
    gap: var(--space-2);
}

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

/* Beautiful Login Button */
.login-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    width: 100%;
    padding: var(--space-4);
    background: linear-gradient(135deg, var(--color-primary-600), var(--color-primary-700));
    border: none;
    border-radius: 12px;
    color: white;
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    margin-top: var(--space-4);
    box-shadow: 
        0 4px 15px rgba(59, 130, 246, 0.3),
        0 0 0 1px rgba(59, 130, 246, 0.1);
    position: relative;
    overflow: hidden;
}

.login-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.6s ease;
}

.login-btn:hover {
    background: linear-gradient(135deg, var(--color-primary-700), var(--color-primary-800));
    transform: translateY(-2px);
    box-shadow: 
        0 8px 25px rgba(59, 130, 246, 0.4),
        0 0 0 1px rgba(59, 130, 246, 0.2);
}

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

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

/* Divider */
.divider {
    display: flex;
    align-items: center;
    margin: var(--space-8) 0;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

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

.divider span {
    padding: 0 var(--space-4);
    background: var(--color-surface-elevated);
}

/* Signup Section */
.signup-section {
    text-align: center;
}

.signup-section p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-4);
}

.signup-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    background: transparent;
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: 10px;
    color: var(--color-primary-500);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.signup-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background: linear-gradient(90deg, rgba(59, 130, 246, 0.1), rgba(16, 185, 129, 0.1));
    transition: width 0.3s ease;
    z-index: -1;
}

.signup-btn:hover {
    border-color: var(--color-primary-500);
    color: var(--color-primary-400);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.2);
}

.signup-btn:hover::before {
    width: 100%;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        padding: 0 var(--space-4);
    }
    
    .main {
        padding: var(--space-4);
        padding-top: calc(64px + var(--space-4));
    }
    
    .login-card {
        padding: var(--space-8);
    }
    
    .login-title {
        font-size: var(--font-size-2xl);
    }
    
    .btn-secondary {
        font-size: 0.75rem;
        padding: var(--space-2) var(--space-4);
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 var(--space-3);
    }
    
    .main {
        padding: var(--space-3);
        padding-top: calc(64px + var(--space-3));
    }
    
    .login-card {
        padding: var(--space-6);
    }
    
    .nav-brand-text {
        font-size: 1.125rem;
    }
    
    .btn-secondary span:not(.fas) {
        display: none;
    }
}

/* Focus States for Accessibility */
.btn:focus,
.login-btn:focus,
.signup-btn:focus {
    outline: 2px solid var(--color-primary-500);
    outline-offset: 2px;
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--primary-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}