/* Any Bike Transformer - Advanced Styles */
/* Following best practices from ULTIMATE_WEBSITE_OPTIMIZATION_MANUAL */

/* CSS Custom Properties for Theming */
:root {
    /* Color System */
    --color-primary-50: #e6f7ef;
    --color-primary-100: #b3e5cf;
    --color-primary-200: #80d4af;
    --color-primary-300: #4dc28f;
    --color-primary-400: #26b673;
    --color-primary-500: #00a652;
    --color-primary-600: #008642;
    --color-primary-700: #006632;
    --color-primary-800: #004621;
    --color-primary-900: #002611;

    --color-secondary-50: #fff3e0;
    --color-secondary-100: #ffe0b2;
    --color-secondary-200: #ffcc80;
    --color-secondary-300: #ffb74d;
    --color-secondary-400: #ffa726;
    --color-secondary-500: #f39200;
    --color-secondary-600: #e68900;
    --color-secondary-700: #d97e00;
    --color-secondary-800: #cc7300;
    --color-secondary-900: #b36500;

    /* Semantic Colors */
    --color-success: #00a652;
    --color-warning: #f39200;
    --color-error: #dc3545;
    --color-info: #0dcaf0;

    /* Typography Scale - Fluid Typography */
    --font-size-xs: clamp(0.75rem, 2vw, 0.875rem);
    --font-size-sm: clamp(0.875rem, 2.5vw, 1rem);
    --font-size-base: clamp(1rem, 3vw, 1.125rem);
    --font-size-lg: clamp(1.125rem, 3.5vw, 1.25rem);
    --font-size-xl: clamp(1.25rem, 4vw, 1.5rem);
    --font-size-2xl: clamp(1.5rem, 5vw, 2rem);
    --font-size-3xl: clamp(2rem, 6vw, 3rem);
    --font-size-4xl: clamp(2.5rem, 7vw, 4rem);

    /* Spacing Scale */
    --space-xs: clamp(0.25rem, 1vw, 0.5rem);
    --space-sm: clamp(0.5rem, 2vw, 1rem);
    --space-md: clamp(1rem, 3vw, 1.5rem);
    --space-lg: clamp(1.5rem, 4vw, 2rem);
    --space-xl: clamp(2rem, 5vw, 3rem);
    --space-2xl: clamp(3rem, 6vw, 4rem);
    --space-3xl: clamp(4rem, 8vw, 6rem);

    /* Layout */
    --container-max-width: 1200px;
    --header-height: 80px;

    /* Animation */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    --shadow-md: 0 3px 6px rgba(0, 0, 0, 0.15), 0 2px 4px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.15), 0 3px 6px rgba(0, 0, 0, 0.10);
    --shadow-xl: 0 15px 25px rgba(0, 0, 0, 0.15), 0 5px 10px rgba(0, 0, 0, 0.05);
    --shadow-2xl: 0 20px 40px rgba(0, 0, 0, 0.2);

    /* Z-index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --color-text: #f8f9fa;
        --color-text-light: #adb5bd;
        --color-bg: #212529;
        --color-bg-light: #343a40;
        --color-card-bg: #2d3238;
    }

    body {
        background: var(--color-bg);
        color: var(--color-text);
    }

    .feature-card,
    .testimonial-card {
        background: var(--color-card-bg);
    }

    header {
        background: var(--color-bg-light);
    }
}

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

/* Utility Classes following BEM methodology */
.u-visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

.u-text-center { text-align: center !important; }
.u-text-left { text-align: left !important; }
.u-text-right { text-align: right !important; }

/* Component: Loading Animation */
.c-loader {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(0, 166, 82, 0.3);
    border-radius: 50%;
    border-top-color: var(--color-primary);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Component: Badge */
.c-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25em 0.75em;
    font-size: var(--font-size-xs);
    font-weight: 600;
    line-height: 1;
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
    border-radius: 0.25rem;
    background: var(--color-primary);
    color: white;
}

.c-badge--secondary {
    background: var(--color-secondary);
}

.c-badge--success {
    background: var(--color-success);
}

.c-badge--warning {
    background: var(--color-warning);
}

/* Component: Progress Bar */
.c-progress {
    display: flex;
    height: 1rem;
    overflow: hidden;
    font-size: 0.75rem;
    background-color: #e9ecef;
    border-radius: 0.25rem;
}

.c-progress__bar {
    display: flex;
    flex-direction: column;
    justify-content: center;
    overflow: hidden;
    color: #fff;
    text-align: center;
    white-space: nowrap;
    background-color: var(--color-primary);
    transition: width var(--transition-base);
}

/* Component: Alert */
.c-alert {
    position: relative;
    padding: 1rem 1.5rem;
    margin-bottom: 1rem;
    border: 1px solid transparent;
    border-radius: 0.5rem;
}

.c-alert--success {
    color: #0f5132;
    background-color: #d1e7dd;
    border-color: #badbcc;
}

.c-alert--warning {
    color: #664d03;
    background-color: #fff3cd;
    border-color: #ffecb5;
}

.c-alert--error {
    color: #842029;
    background-color: #f8d7da;
    border-color: #f5c2c7;
}

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

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

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

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(0, 166, 82, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(0, 166, 82, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(0, 166, 82, 0);
    }
}

/* Scroll Animations */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all var(--transition-slow);
}

.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Grid System */
.grid {
    display: grid;
    gap: var(--space-md);
}

.grid--auto-fit {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
}

.grid--auto-fill {
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
}

/* Responsive breakpoints */
@media (min-width: 640px) {
    .grid--cols-sm-2 { grid-template-columns: repeat(2, 1fr); }
    .grid--cols-sm-3 { grid-template-columns: repeat(3, 1fr); }
    .grid--cols-sm-4 { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 768px) {
    .grid--cols-md-2 { grid-template-columns: repeat(2, 1fr); }
    .grid--cols-md-3 { grid-template-columns: repeat(3, 1fr); }
    .grid--cols-md-4 { grid-template-columns: repeat(4, 1fr); }
    .grid--cols-md-5 { grid-template-columns: repeat(5, 1fr); }
    .grid--cols-md-6 { grid-template-columns: repeat(6, 1fr); }
}

@media (min-width: 1024px) {
    .grid--cols-lg-2 { grid-template-columns: repeat(2, 1fr); }
    .grid--cols-lg-3 { grid-template-columns: repeat(3, 1fr); }
    .grid--cols-lg-4 { grid-template-columns: repeat(4, 1fr); }
    .grid--cols-lg-5 { grid-template-columns: repeat(5, 1fr); }
    .grid--cols-lg-6 { grid-template-columns: repeat(6, 1fr); }
    .grid--cols-lg-8 { grid-template-columns: repeat(8, 1fr); }
    .grid--cols-lg-12 { grid-template-columns: repeat(12, 1fr); }
}

/* Form Enhancements */
.form-control {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: var(--font-size-base);
    font-weight: 400;
    line-height: 1.5;
    color: var(--color-text);
    background-color: #fff;
    background-clip: padding-box;
    border: 1px solid #ced4da;
    appearance: none;
    border-radius: 0.5rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
    color: var(--color-text);
    background-color: #fff;
    border-color: var(--color-primary);
    outline: 0;
    box-shadow: 0 0 0 0.25rem rgba(0, 166, 82, 0.25);
}

.form-control:disabled {
    background-color: #e9ecef;
    opacity: 1;
}

/* Floating Labels */
.form-floating {
    position: relative;
}

.form-floating > .form-control {
    height: 3.5rem;
    padding: 1rem 0.75rem;
}

.form-floating > label {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    padding: 1rem 0.75rem;
    pointer-events: none;
    border: 1px solid transparent;
    transform-origin: 0 0;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.form-floating > .form-control:focus ~ label,
.form-floating > .form-control:not(:placeholder-shown) ~ label {
    opacity: 0.65;
    transform: scale(0.85) translateY(-0.5rem) translateX(0.15rem);
}

/* Card Component Enhancements */
.card {
    position: relative;
    display: flex;
    flex-direction: column;
    min-width: 0;
    word-wrap: break-word;
    background-color: #fff;
    background-clip: border-box;
    border: 1px solid rgba(0, 0, 0, 0.125);
    border-radius: 0.5rem;
    overflow: hidden;
}

.card-img-top {
    width: 100%;
    height: auto;
    object-fit: cover;
}

.card-body {
    flex: 1 1 auto;
    padding: 1.25rem;
}

.card-title {
    margin-bottom: 0.75rem;
    font-size: var(--font-size-xl);
    font-weight: 600;
}

.card-text {
    margin-bottom: 1rem;
}

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-text {
    height: 1rem;
    margin-bottom: 0.5rem;
    border-radius: 0.25rem;
}

.skeleton-title {
    height: 2rem;
    margin-bottom: 1rem;
    border-radius: 0.25rem;
}

.skeleton-image {
    height: 200px;
    border-radius: 0.5rem;
}

/* Tooltip */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip .tooltip-text {
    visibility: hidden;
    width: 200px;
    background-color: #555;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 5px 10px;
    position: absolute;
    z-index: var(--z-tooltip);
    bottom: 125%;
    left: 50%;
    margin-left: -100px;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.tooltip .tooltip-text::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: #555 transparent transparent transparent;
}

.tooltip:hover .tooltip-text {
    visibility: visible;
    opacity: 1;
}

/* Accessibility Improvements */
.focus-visible:focus {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    *,
    *::before,
    *::after {
        background: transparent !important;
        color: #000 !important;
        box-shadow: none !important;
        text-shadow: none !important;
    }

    a,
    a:visited {
        text-decoration: underline;
    }

    a[href]::after {
        content: " (" attr(href) ")";
    }

    img {
        max-width: 100% !important;
    }

    p,
    h2,
    h3 {
        orphans: 3;
        widows: 3;
    }

    h2,
    h3 {
        page-break-after: avoid;
    }
}