/* =====================================================
   YİKOB Premium Login Page
   Design: Apple, Stripe, Linear inspired
   ===================================================== */

/* CSS Custom Properties - Light Theme */
:root {
    /* Colors */
    --color-bg-primary: #f8fafc;
    --color-bg-secondary: #ffffff;
    --color-bg-tertiary: #f1f5f9;
    --color-bg-glass: rgba(255, 255, 255, 0.7);
    --color-bg-glass-hover: rgba(255, 255, 255, 0.85);
    
    --color-text-primary: #0f172a;
    --color-text-secondary: #475569;
    --color-text-tertiary: #94a3b8;
    --color-text-inverse: #ffffff;
    
    --color-border: rgba(148, 163, 184, 0.2);
    --color-border-focus: rgba(99, 102, 241, 0.5);
    
    --color-accent: #6366f1;
    --color-accent-hover: #4f46e5;
    --color-accent-light: rgba(99, 102, 241, 0.1);
    
    --color-success: #10b981;
    --color-success-light: rgba(16, 185, 129, 0.1);
    --color-error: #ef4444;
    --color-error-light: rgba(239, 68, 68, 0.1);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    --gradient-secondary: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    --gradient-orb-1: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
    --gradient-orb-2: radial-gradient(circle, rgba(139, 92, 246, 0.12) 0%, transparent 70%);
    --gradient-orb-3: radial-gradient(circle, rgba(168, 85, 247, 0.1) 0%, transparent 70%);
    
    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.04), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.04), 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.05), 0 10px 10px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.08);
    --shadow-card: 0 0 0 1px var(--color-border), 0 8px 40px rgba(0, 0, 0, 0.04);
    --shadow-input: 0 0 0 1px var(--color-border);
    --shadow-input-focus: 0 0 0 3px var(--color-accent-light), 0 0 0 1px var(--color-accent);
    
    /* 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-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.625;
    
    /* 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;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 20px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Dark Theme */
[data-theme="dark"] {
    --color-bg-primary: #0f172a;
    --color-bg-secondary: #1e293b;
    --color-bg-tertiary: #334155;
    --color-bg-glass: rgba(30, 41, 59, 0.8);
    --color-bg-glass-hover: rgba(51, 65, 85, 0.9);
    
    --color-text-primary: #f1f5f9;
    --color-text-secondary: #94a3b8;
    --color-text-tertiary: #64748b;
    --color-text-inverse: #0f172a;
    
    --color-border: rgba(148, 163, 184, 0.15);
    --color-border-focus: rgba(129, 140, 248, 0.5);
    
    --color-accent: #818cf8;
    --color-accent-hover: #6366f1;
    --color-accent-light: rgba(129, 140, 248, 0.15);
    
    --gradient-secondary: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    --gradient-orb-1: radial-gradient(circle, rgba(99, 102, 241, 0.2) 0%, transparent 70%);
    --gradient-orb-2: radial-gradient(circle, rgba(139, 92, 246, 0.15) 0%, transparent 70%);
    --gradient-orb-3: radial-gradient(circle, rgba(168, 85, 247, 0.12) 0%, transparent 70%);
    
    --shadow-card: 0 0 0 1px var(--color-border), 0 8px 40px rgba(0, 0, 0, 0.2);
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    background: var(--color-bg-primary);
    min-height: 100vh;
    overflow-x: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Background Decoration */
.bg-decoration {
    position: fixed;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
    z-index: 0;
}

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

.orb-1 {
    width: 600px;
    height: 600px;
    background: var(--gradient-orb-1);
    top: -200px;
    right: -100px;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: var(--gradient-orb-2);
    bottom: -150px;
    left: -100px;
    animation-delay: -7s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: var(--gradient-orb-3);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    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); }
}

.grid-pattern {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(var(--color-border) 1px, transparent 1px),
        linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0.3;
    mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    top: var(--space-6);
    right: var(--space-6);
    z-index: 100;
    width: 44px;
    height: 44px;
    border: none;
    border-radius: var(--radius-lg);
    background: var(--color-bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-card);
    cursor: pointer;
            display: flex;
    align-items: center;
            justify-content: center;
    color: var(--color-text-secondary);
    transition: var(--transition-base);
}

.theme-toggle:hover {
    background: var(--color-bg-glass-hover);
    color: var(--color-text-primary);
    transform: scale(1.05);
}

.theme-toggle:active {
    transform: scale(0.95);
}

.sun-icon, .moon-icon {
    position: absolute;
    transition: var(--transition-base);
}

[data-theme="light"] .moon-icon,
[data-theme="dark"] .sun-icon {
    opacity: 0;
    transform: rotate(-90deg) scale(0.5);
}

[data-theme="light"] .sun-icon,
[data-theme="dark"] .moon-icon {
    opacity: 1;
    transform: rotate(0) scale(1);
}

/* Main Layout */
.login-main {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-8);
}

.login-container {
    width: 100%;
    max-width: 420px;
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
    background: var(--color-bg-secondary);
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow-card);
    animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
        
/* Logo Section */
.logo-section {
    text-align: center;
}

.logo-wrapper {
    display: inline-flex;
    align-items: center;
    gap: var(--space-4);
}

.logo-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-xl);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--shadow-lg), 0 0 30px rgba(99, 102, 241, 0.3);
}

.logo-text h1 {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.02em;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-subtitle {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-tertiary);
    text-align: left;
}

/* Login Card */
.login-card {
    background: var(--color-bg-glass);
    backdrop-filter: blur(40px);
    -webkit-backdrop-filter: blur(40px);
    border-radius: var(--radius-2xl);
    padding: var(--space-10);
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-border);
}

.card-header {
            text-align: center;
    margin-bottom: var(--space-8);
        }
        
.card-header h2 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
        }
        
.card-header p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* Error Message */
.error-message {
    display: none;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    background: var(--color-error-light);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-6);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-error);
    animation: shake 0.5s cubic-bezier(0.36, 0.07, 0.19, 0.97);
}

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

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-8px); }
    40% { transform: translateX(8px); }
    60% { transform: translateX(-6px); }
    80% { transform: translateX(6px); }
}

/* Form Styles */
        .form-group {
    margin-bottom: var(--space-5);
        }
        
        .form-group label {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2);
}

.form-group label svg {
    color: var(--color-text-tertiary);
}

.input-wrapper {
    position: relative;
    border-radius: var(--radius-lg);
    background: var(--color-bg-secondary);
    box-shadow: var(--shadow-input);
    transition: var(--transition-base);
        }
        
.input-wrapper.focused {
    box-shadow: var(--shadow-input-focus);
}

.input-wrapper input {
            width: 100%;
    padding: var(--space-4) var(--space-5);
    border: none;
    border-radius: var(--radius-lg);
    background: transparent;
    font-family: inherit;
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    outline: none;
}

.input-wrapper input::placeholder {
    color: var(--color-text-tertiary);
        }
        
.password-wrapper {
    display: flex;
    align-items: center;
}

.password-wrapper input {
    padding-right: var(--space-12);
}

.toggle-password {
    position: absolute;
    right: var(--space-4);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-tertiary);
    padding: var(--space-2);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.toggle-password:hover {
    color: var(--color-text-secondary);
        }
        
/* Login Button */
        .login-btn {
            width: 100%;
    padding: var(--space-4) var(--space-6);
    margin-top: var(--space-6);
    border: none;
    border-radius: var(--radius-lg);
    background: var(--gradient-primary);
            color: white;
    font-family: inherit;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
            cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    position: relative;
    overflow: hidden;
    transition: var(--transition-base);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.login-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 50%);
    opacity: 0;
    transition: var(--transition-base);
}

.login-btn:hover::before {
    opacity: 1;
        }
        
        .login-btn:hover {
            transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
        }
        
        .login-btn:active {
            transform: translateY(0);
        }
        
.login-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.login-btn.success {
    background: var(--color-success);
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

.btn-arrow {
    transition: var(--transition-base);
}

.login-btn:hover .btn-arrow {
    transform: translateX(4px);
}

/* Form Footer */
.form-footer {
    margin-top: var(--space-6);
    text-align: center;
}

.forgot-password-link {
    background: none;
    border: none;
    color: var(--color-accent);
    font-family: inherit;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.forgot-password-link:hover {
    background: var(--color-accent-light);
}

/* Login Footer */
.login-footer {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
}

.footer-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: var(--color-bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    box-shadow: var(--shadow-sm);
}

.footer-badge svg {
    color: var(--color-accent);
}

.copyright {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
}

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
    opacity: 0;
    transition: var(--transition-base);
}

.modal-overlay.active {
    display: flex;
    opacity: 1;
}

.modal-content {
    position: relative;
    width: 100%;
    max-width: 400px;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-2xl);
    padding: var(--space-10);
    box-shadow: var(--shadow-2xl);
    animation: modalSlideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

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

.modal-close {
    position: absolute;
    top: var(--space-5);
    right: var(--space-5);
    width: 36px;
    height: 36px;
    border: none;
    border-radius: var(--radius-md);
    background: var(--color-bg-tertiary);
    color: var(--color-text-tertiary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.modal-close:hover {
    background: var(--color-error-light);
    color: var(--color-error);
}

.modal-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-6);
    border-radius: var(--radius-xl);
    background: var(--color-accent-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
}

.modal-content h3 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    text-align: center;
    margin-bottom: var(--space-3);
}

.modal-content > p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    text-align: center;
    margin-bottom: var(--space-6);
    line-height: var(--line-height-relaxed);
}

.modal-actions {
    display: flex;
    gap: var(--space-3);
    margin-top: var(--space-6);
}

.btn-secondary {
    flex: 1;
    padding: var(--space-3) var(--space-5);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
    font-family: inherit;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: var(--transition-fast);
}

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

.btn-primary {
    flex: 1;
    padding: var(--space-3) var(--space-5);
    border: none;
    border-radius: var(--radius-lg);
    background: var(--gradient-primary);
    color: white;
    font-family: inherit;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

/* Reset Message */
.reset-message {
            display: none;
    margin-top: var(--space-5);
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
            text-align: center;
        }
        
.reset-message.success {
    background: var(--color-success-light);
    color: var(--color-success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.reset-message.error {
    background: var(--color-error-light);
    color: var(--color-error);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

/* Reset Steps */
.reset-step {
    display: none;
}

.reset-step.active {
            display: block;
    animation: fadeIn 0.3s ease;
        }
        
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Code Input */
.code-input-wrapper {
    display: flex;
    justify-content: center;
    gap: var(--space-2);
    margin: var(--space-6) 0;
}

.code-input {
    width: 48px;
    height: 56px;
    text-align: center;
    font-size: 24px;
    font-weight: var(--font-weight-bold);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    transition: var(--transition-base);
}

.code-input:focus {
    outline: none;
    border-color: var(--color-accent);
    background: var(--color-bg-secondary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.code-input.filled {
    border-color: var(--color-success);
    background: var(--color-success-light);
}

/* Resend Code */
.resend-code {
    text-align: center;
    margin-top: var(--space-4);
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.resend-code button {
    background: none;
    border: none;
    color: var(--color-accent);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    margin-left: var(--space-2);
    transition: var(--transition-fast);
}

.resend-code button:hover {
    text-decoration: underline;
}

.resend-code button:disabled {
    color: var(--color-text-tertiary);
    cursor: not-allowed;
}

/* Responsive */
@media (max-width: 480px) {
    .login-main {
        padding: var(--space-6);
        }
        
    .login-card {
        padding: var(--space-8);
    }
    
    .logo-wrapper {
        flex-direction: column;
        text-align: center;
    }
    
    .logo-subtitle {
            text-align: center;
    }
    
    .theme-toggle {
        top: var(--space-4);
        right: var(--space-4);
        }
        
    .modal-content {
        padding: var(--space-8);
    }
}

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

input:focus-visible,
button:focus-visible {
    outline: none;
}