/* Common CSS - Design System & Shared Styles */

:root {
    /* Color Tokens */
    --primary: #6C1E54;
    --primary-dark: #923E5A;
    --primary-light: #923E5A;
    --black: #111;
    --text: #3a3a3a;
    --text-light: #6b7280;
    --muted: #6b7280;
    --bg: #f6f7fb;
    --bg-light: #ffffff;
    --bg-dark: #1f2937;
    --border: #e5e7eb;
    --border-light: #f3f4f6;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;

    /* Gradients */
    --grad-1: linear-gradient(135deg, #ff4d6d, #6a5af9);
    --grad-2: linear-gradient(135deg, #4facfe, #00f2fe);
    --grad-3: linear-gradient(135deg, #667eea, #764ba2);
    --grad-4: linear-gradient(135deg, #f093fb, #f5576c);
    --grad-5: linear-gradient(135deg, #4facfe, #00f2fe);
    --grad-6: linear-gradient(135deg, #43e97b, #38f9d7);

    /* 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;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --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);
    --shadow-soft: 0 8px 32px rgba(0, 0, 0, 0.1);
    --shadow-frosted: 0 8px 32px rgba(31, 38, 135, 0.37);

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition: all 0.2s ease-in-out;
    --transition-fast: all 0.15s ease-in-out;
    --transition-slow: all 0.3s ease-in-out;

    /* Photos (Local assets) */
    --img-hero-dashboard: url("../img/hero-dashboard.jpg");
    --img-hero-ecommerce: url("../img/hero-ecommerce.jpg");
    --img-hero-office: url("../img/hero-office.jpg");
    --img-hero-finance: url("../img/hero-finance.jpg");
    --img-hero-mobile: url("../img/hero-mobile.jpg");
    --img-hero-people: url("../img/hero-people.jpg");
    --img-hero-sunset: url("../img/hero-sunset.jpg");

    /* Illustrations (Local assets) */
    --svg-illustration-1: url("../img/illustration-1.svg");
    --svg-illustration-2: url("../img/illustration-2.svg");
    --svg-illustration-3: url("../img/illustration-3.svg");
    --svg-illustration-4: url("../img/illustration-4.svg");
    --svg-illustration-5: url("../img/illustration-5.svg");

    /* Testimonial avatar (Local asset) */
    --img-avatar-1: url("../img/testimonial-avatar.jpg");

    /* Gradient fallbacks */
    --bg-grad-1: linear-gradient(135deg, #4facfe, #00f2fe);
    --bg-grad-2: linear-gradient(135deg, #ff4d6d, #6a5af9);
}

/* Base Styles */
* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text);
    background-color: var(--bg);
    margin: 0;
    padding: 0;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--black);
}

h1 {
    font-size: var(--font-size-4xl);
}

h2 {
    font-size: var(--font-size-3xl);
}

h3 {
    font-size: var(--font-size-2xl);
}

h4 {
    font-size: var(--font-size-xl);
}

h5 {
    font-size: var(--font-size-lg);
}

h6 {
    font-size: var(--font-size-base);
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-light);
}

/* Layout Components */
.split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 100vh;
    background: var(--bg);
}

@media (max-width: 991.98px) {
    .split {
        grid-template-columns: 1fr;
    }
}

.split-left {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
    background: var(--bg-light);
}

.split-right {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
    background: var(--bg-light);
}

.illustration-pane {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
    background: var(--bg-grad-1);
    background-image: var(--svg-illustration-2);
    background-repeat: no-repeat;
    background-position: center;
    background-size: 60%;
    position: relative;
    overflow: hidden;
    background-color: #0f172a;
    /* Fallback if image fails */
}

.illustration-pane[data-variant="dashboard"] {
    background-image: var(--svg-illustration-1);
}

.illustration-pane[data-variant="payments"] {
    background-image: var(--svg-illustration-3);
}

.illustration-pane[data-variant="product"] {
    background-image: var(--svg-illustration-4);
}

.illustration-pane[data-variant="people"] {
    background-image: var(--svg-illustration-5);
}

.photo-hero {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
    background: var(--bg-grad-2);
    background-image: var(--img-hero-sunset);
    background-size: cover;
    background-position: center;
    position: relative;
    overflow: hidden;
    background-color: #0f172a;
    /* Fallback if image fails */
}

.photo-hero[data-topic="ecommerce"] {
    background-image: var(--img-hero-ecommerce);
}

.photo-hero[data-topic="office"] {
    background-image: var(--img-hero-office);
}

.photo-hero[data-topic="finance"] {
    background-image: var(--img-hero-finance);
}

.photo-hero[data-topic="mobile"] {
    background-image: var(--img-hero-mobile);
}

.photo-hero[data-topic="people"] {
    background-image: var(--img-hero-people);
}

.photo-hero[data-topic="dashboard"] {
    background-image: var(--img-hero-dashboard);
}

.form-card {
    background: var(--bg-light);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-3xl);
    width: 100%;
    max-width: 480px;
    margin: 0 auto;
}

.form-card-compact {
    max-width: 400px;
    padding: var(--spacing-2xl);
}

.form-card-minimal {
    max-width: 360px;
    padding: var(--spacing-xl);
}

/* Form Styles */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    color: var(--text);
}

.form-control {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    transition: var(--transition);
    background-color: var(--bg-light);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 91, 255, 0.1);
}

.form-control::placeholder {
    color: var(--text-light);
}

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

.input-group .form-control {
    padding-left: 3rem;
}

.input-group-icon {
    position: absolute;
    left: var(--spacing-md);
    color: var(--text-light);
    z-index: 2;
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    gap: var(--spacing-sm);
    min-height: 48px;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--bg-light);
    color: var(--text);
    border: 2px solid var(--border);
}

.btn-secondary:hover {
    background: var(--border-light);
    border-color: var(--text-light);
}

.btn-google {
    background: white;
    color: var(--text);
    border: 2px solid var(--border);
}

.btn-google:hover {
    background: var(--border-light);
    border-color: var(--text-light);
}

.btn-apple {
    background: var(--black);
    color: white;
}

.btn-apple:hover {
    background: #333;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-facebook {
    background: #1877f2;
    color: white;
}

.btn-facebook:hover {
    background: #166fe5;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-microsoft {
    background: #00a4ef;
    color: white;
}

.btn-microsoft:hover {
    background: #0098db;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-twitter {
    background: #1da1f2;
    color: white;
}

.btn-twitter:hover {
    background: #1a91da;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-block {
    width: 100%;
}

/* Social Login Buttons */
.social-login {
    display: flex;
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.social-login .btn {
    flex: 1;
    justify-content: center;
}

.social-login-vertical .btn {
    width: 100%;
    margin-bottom: var(--spacing-md);
}

/* Separator */
.separator {
    display: flex;
    align-items: center;
    text-align: center;
    margin: var(--spacing-xl) 0;
    color: var(--text-light);
    font-size: var(--font-size-sm);
}

.separator::before,
.separator::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--border);
}

.separator span {
    padding: 0 var(--spacing-md);
}

/* Links */
.link {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

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

.link-muted {
    color: var(--text-light);
}

.link-muted:hover {
    color: var(--text);
}

/* Checkbox */
.form-check {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.form-check-input {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.form-check-input:checked {
    background-color: var(--primary);
    border-color: var(--primary);
}

.form-check-label {
    font-size: var(--font-size-sm);
    color: var(--text);
    cursor: pointer;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mb-0 {
    margin-bottom: 0;
}

.mb-1 {
    margin-bottom: var(--spacing-xs);
}

.mb-2 {
    margin-bottom: var(--spacing-sm);
}

.mb-3 {
    margin-bottom: var(--spacing-md);
}

.mb-4 {
    margin-bottom: var(--spacing-lg);
}

.mb-5 {
    margin-bottom: var(--spacing-xl);
}

.mt-0 {
    margin-top: 0;
}

.mt-1 {
    margin-top: var(--spacing-xs);
}

.mt-2 {
    margin-top: var(--spacing-sm);
}

.mt-3 {
    margin-top: var(--spacing-md);
}

.mt-4 {
    margin-top: var(--spacing-lg);
}

.mt-5 {
    margin-top: var(--spacing-xl);
}

.p-0 {
    padding: 0;
}

.p-1 {
    padding: var(--spacing-xs);
}

.p-2 {
    padding: var(--spacing-sm);
}

.p-3 {
    padding: var(--spacing-md);
}

.p-4 {
    padding: var(--spacing-lg);
}

.p-5 {
    padding: var(--spacing-xl);
}

.shadow-soft {
    box-shadow: var(--shadow-soft);
}

.shadow-frosted {
    box-shadow: var(--shadow-frosted);
}

.frosted {
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.18);
}

/* Responsive Design */
@media (max-width: 768px) {
    .split {
        flex-direction: column;
    }

    .split-left,
    .split-right {
        padding: var(--spacing-lg);
        min-height: auto;
    }

    .form-card {
        padding: var(--spacing-xl);
        margin: var(--spacing-md);
    }

    .social-login {
        flex-direction: column;
    }

    .social-login .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .form-card {
        padding: var(--spacing-lg);
        margin: var(--spacing-sm);
    }

    .split-left,
    .split-right {
        padding: var(--spacing-md);
    }
}

/* Device Preview Classes */
.device-tablet .split {
    max-width: 768px;
    margin: 0 auto;
    min-height: 1024px;
}

.device-mobile .split {
    max-width: 375px;
    margin: 0 auto;
    min-height: 667px;
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

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

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

.slide-in-left {
    animation: slideInLeft 0.6s ease-out;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }

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

.slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }

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

/* Focus States for Accessibility */
.btn:focus,
.form-control:focus,
.form-check-input:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --border: #000;
        --text-light: #333;
    }

    .form-control {
        border-width: 3px;
    }
}

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