/* ============================================
   AUCTION PROJECT - MODERN LOGIN STYLES
   ============================================ */

:root {
    /* Color System */
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #3b82f6;
    --color-primary-subtle: #eff6ff;
    --color-surface: #ffffff;
    --color-background: #f8fafc;
    --color-border: #e2e8f0;
    --color-border-focus: #2563eb;
    --color-text-primary: #0f172a;
    --color-text-secondary: #64748b;
    --color-text-muted: #94a3b8;
    --color-error: #dc2626;
    --color-error-bg: #fef2f2;
    --color-success: #16a34a;
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    /* Spacing Scale */
    --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;
    /* Effects */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-focus: 0 0 0 3px rgba(37, 99, 235, 0.15);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
}

/* ============================================
   RESET & BASE
   ============================================ */

* {
    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);
    color: var(--color-text-primary);
    background-color: var(--color-background);
    line-height: 1.5;
    min-height: 100vh;
}

/* ============================================
   LAYOUT: SPLIT PANEL
   ============================================ */

.login-page {
    display: grid;
    grid-template-columns: 1fr;
    min-height: 100vh;
    width: 100%;
}

/* ============================================
   LEFT PANEL: VISUAL / BRANDING
   ============================================ */

.login-visual {
    display: none;
    position: relative;
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    overflow: hidden;
    padding: var(--space-12);
}

.visual-content {
    position: relative;
    z-index: 2;
    max-width: 480px;
    margin: auto;
    color: white;
    text-align: center;
}

.brand-mark {
    width: 120px;
    height: 120px;
    margin: 0 auto var(--space-8);
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    transition: transform var(--transition-base);
}

    .brand-mark:hover {
        transform: scale(1.05);
    }

    .brand-mark img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }

.visual-headline {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--space-4);
    letter-spacing: -0.025em;
    line-height: 1.2;
}

.visual-subtitle {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--space-10);
    line-height: 1.6;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    text-align: left;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.85);
}

.feature-icon {
    font-size: 1.25rem;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
}

/* Decorative Background Shapes */
.bg-shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float 20s infinite ease-in-out;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: var(--color-primary);
    top: -100px;
    right: -100px;
    animation-delay: 0s;
}

.shape-2 {
    width: 300px;
    height: 300px;
    background: #8b5cf6;
    bottom: -50px;
    left: -50px;
    animation-delay: -5s;
}

.shape-3 {
    width: 250px;
    height: 250px;
    background: #06b6d4;
    top: 40%;
    left: 30%;
    animation-delay: -10s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }

    33% {
        transform: translate(30px, -30px) scale(1.1);
    }

    66% {
        transform: translate(-20px, 20px) scale(0.9);
    }
}

/* ============================================
   RIGHT PANEL: FORM
   ============================================ */

.login-form-panel {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
    background-color: var(--color-background);
}

.form-wrapper {
    width: 100%;
    max-width: 420px;
    animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.form-header {
    text-align: center;
    margin-bottom: var(--space-8);
}

    .form-header h2 {
        font-size: 1.875rem;
        font-weight: 700;
        color: var(--color-text-primary);
        margin-bottom: var(--space-2);
        letter-spacing: -0.025em;
    }

    .form-header p {
        color: var(--color-text-secondary);
        font-size: 0.9375rem;
    }

/* ============================================
   FORM ELEMENTS
   ============================================ */

.form {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

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

.form-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-primary);
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: var(--space-3);
    color: var(--color-text-muted);
    pointer-events: none;
    transition: color var(--transition-fast);
}

.form-input {
    width: 100%;
    height: 48px;
    padding: 0 var(--space-3) 0 var(--space-10);
    font-size: 0.9375rem;
    font-family: inherit;
    color: var(--color-text-primary);
    background-color: var(--color-surface);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    outline: none;
}

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

    .form-input:hover {
        border-color: #cbd5e1;
    }

    .form-input:focus {
        border-color: var(--color-border-focus);
        box-shadow: var(--shadow-focus);
    }

        .form-input:focus + .input-icon,
        .input-wrapper:focus-within .input-icon {
            color: var(--color-primary);
        }

/* Password Toggle */
.toggle-password {
    position: absolute;
    right: var(--space-3);
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: var(--space-1);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition-fast);
}

    .toggle-password:hover {
        color: var(--color-text-secondary);
    }

    .toggle-password.active {
        color: var(--color-primary);
    }

/* Validation */
.validation-message {
    font-size: 0.8125rem;
    color: var(--color-error);
    min-height: 1.25rem;
}

/* ============================================
   FORM OPTIONS
   ============================================ */

.form-options {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: var(--space-1);
}

/* Custom Checkbox */
.checkbox-wrapper {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    user-select: none;
}

    .checkbox-wrapper input {
        position: absolute;
        opacity: 0;
        cursor: pointer;
        height: 0;
        width: 0;
    }

.checkmark {
    width: 18px;
    height: 18px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.checkbox-wrapper input:checked ~ .checkmark {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

    .checkbox-wrapper input:checked ~ .checkmark::after {
        content: '';
        width: 5px;
        height: 9px;
        border: solid white;
        border-width: 0 2px 2px 0;
        transform: rotate(45deg);
        margin-bottom: 2px;
    }

.checkbox-wrapper:hover .checkmark {
    border-color: var(--color-primary-light);
}

.forgot-link {
    font-size: 0.875rem;
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

    .forgot-link:hover {
        color: var(--color-primary-dark);
        text-decoration: underline;
    }

/* ============================================
   BUTTONS
   ============================================ */

.btn-primary {
    width: 100%;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    font-family: inherit;
    font-size: 0.9375rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: 0 4px 6px -1px rgba(37, 99, 235, 0.2);
    margin-top: var(--space-2);
}

    .btn-primary:hover {
        transform: translateY(-1px);
        box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.3);
    }

    .btn-primary:active {
        transform: translateY(0);
    }

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

.btn-primary:hover .btn-arrow {
    transform: translateX(3px);
}

.btn-primary:focus-visible {
    outline: none;
    box-shadow: var(--shadow-focus);
}

/* Secondary Buttons */
.btn-secondary,
.btn-ghost {
    width: 100%;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-secondary {
    background-color: var(--color-surface);
    color: var(--color-text-primary);
    border: 1.5px solid var(--color-border);
}

    .btn-secondary:hover {
        background-color: var(--color-background);
        border-color: #cbd5e1;
    }

.btn-ghost {
    background-color: transparent;
    color: var(--color-text-secondary);
    border: 1.5px solid transparent;
}

    .btn-ghost:hover {
        background-color: var(--color-surface);
        color: var(--color-text-primary);
        border-color: var(--color-border);
    }

/* ============================================
   ALERTS
   ============================================ */

.alert {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: 500;
}

.alert-error {
    background-color: var(--color-error-bg);
    color: var(--color-error);
    border: 1px solid #fecaca;
}

/* ============================================
   DIVIDER
   ============================================ */

.divider {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin: var(--space-6) 0;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

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

/* ============================================
   ALTERNATIVE ACTIONS
   ============================================ */

.alternative-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
}

/* ============================================
   FOOTER
   ============================================ */

.form-footer {
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.text-link {
    color: var(--color-primary);
    font-weight: 600;
    text-decoration: none;
    transition: color var(--transition-fast);
}

    .text-link:hover {
        color: var(--color-primary-dark);
        text-decoration: underline;
    }

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Tablets and up */
@media (min-width: 768px) {
    .login-page {
        grid-template-columns: 1fr 1fr;
    }

    .login-visual {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .login-form-panel {
        padding: var(--space-12);
    }

    .visual-headline {
        font-size: 3rem;
    }

    .visual-subtitle {
        font-size: 1.25rem;
    }
}

/* Large screens */
@media (min-width: 1200px) {
    .login-page {
        grid-template-columns: 5fr 4fr;
    }

    .login-form-panel {
        padding: var(--space-16);
    }

    .form-wrapper {
        max-width: 440px;
    }
}

/* Extra large screens */
@media (min-width: 1536px) {
    .login-page {
        grid-template-columns: 1fr 1fr;
    }

    .visual-content {
        max-width: 520px;
    }

    .visual-headline {
        font-size: 3.5rem;
    }
}

/* Mobile optimizations */
@media (max-width: 767px) {
    .login-form-panel {
        padding: var(--space-6) var(--space-4);
        align-items: flex-start;
        padding-top: var(--space-10);
    }

    .form-header h2 {
        font-size: 1.5rem;
    }

    .alternative-actions {
        grid-template-columns: 1fr;
    }
}

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

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