/* =====================================================
   TruSpace Website - Pure HTML/CSS Version
   Modern, Responsive Stylesheet
   ===================================================== */

/* -----------------------------------------------------
   CSS Custom Properties (Design Tokens)
   ----------------------------------------------------- */
:root {
    /* Colors */
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    --color-indigo-400: #818cf8;
    --color-indigo-500: #6366f1;
    --color-indigo-600: #4f46e5;
    
    --color-white: #ffffff;
    --color-white-10: rgba(255, 255, 255, 0.1);
    --color-white-5: rgba(255, 255, 255, 0.05);
    
    /* Gradients */
    --gradient-hero: linear-gradient(to right, #80caff, #4f46e5);
    --gradient-fade: linear-gradient(to top, var(--color-gray-900), transparent);
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, 
                   "Helvetica Neue", Arial, "Noto Sans", sans-serif, 
                   "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    
    --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-size-5xl: 3rem;
    --font-size-7xl: 4.5rem;
    
    --line-height-tight: 1.1;
    --line-height-snug: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* 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;
    --space-20: 5rem;
    --space-24: 6rem;
    --space-32: 8rem;
    --space-40: 10rem;
    --space-56: 14rem;
    
    /* Breakpoints (for reference in media queries) */
    --breakpoint-sm: 640px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1280px;
    
    /* Container */
    --container-max: 80rem;
    --container-padding: var(--space-6);
    
    /* Border Radius */
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-white);
    background-color: var(--color-gray-900);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img,
picture,
video,
canvas,
svg {
    display: block;
    max-width: 100%;
    height: auto;
}

a {
    color: inherit;
    text-decoration: none;
}

button,
input,
select,
textarea {
    font: inherit;
}

/* Screen reader only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* -----------------------------------------------------
   Layout Utilities
   ----------------------------------------------------- */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
}

/* -----------------------------------------------------
   Icons
   ----------------------------------------------------- */
.icon {
    width: 1.5rem;
    height: 1.5rem;
    flex-shrink: 0;
}

.icon--sm {
    width: 1.25rem;
    height: 1.25rem;
}

/* -----------------------------------------------------
   Buttons
   ----------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    line-height: 1.5;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    text-decoration: none;
}

.btn--primary {
    background-color: var(--color-indigo-500);
    color: var(--color-white);
    box-shadow: var(--shadow-sm);
}

.btn--primary:hover {
    background-color: var(--color-indigo-400);
    color: var(--color-white);
}

.btn--primary:focus-visible {
    outline: 2px solid var(--color-indigo-400);
    outline-offset: 2px;
}

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

.btn--text:hover {
    text-decoration: underline;
    color: var(--color-white);
}

.btn--large {
    padding: var(--space-3) var(--space-5);
}

/* -----------------------------------------------------
   Badge
   ----------------------------------------------------- */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    line-height: 1.5;
    color: var(--color-indigo-400);
    background-color: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-full);
    border: 1px solid rgba(99, 102, 241, 0.2);
}

/* -----------------------------------------------------
   Header
   ----------------------------------------------------- */
.header {
    position: sticky;
    top: 0;
    z-index: 50;
    width: 100%;
    background-color: var(--color-gray-900);
    padding: var(--space-2) var(--space-4);
    box-shadow: var(--shadow-lg);
}

.header__nav {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: var(--space-4);
}

.header__github {
    color: var(--color-gray-400);
    transition: color var(--transition-base);
}

.header__github:hover {
    color: var(--color-gray-300);
}

/* -----------------------------------------------------
   Hero Section
   ----------------------------------------------------- */
.hero {
    position: relative;
    isolation: isolate;
    overflow: hidden;
}

.hero__gradient {
    position: absolute;
    left: calc(50% - 4rem);
    top: 2.5rem;
    z-index: -10;
    transform: translateZ(0);
    filter: blur(64px);
}

@media (min-width: 640px) {
    .hero__gradient {
        left: calc(50% - 18rem);
    }
}

@media (min-width: 1024px) {
    .hero__gradient {
        left: 12rem;
        top: calc(50% - 30rem);
    }
}

@media (min-width: 1280px) {
    .hero__gradient {
        left: calc(50% - 24rem);
    }
}

.hero__gradient-shape {
    aspect-ratio: 1108 / 632;
    width: 69.25rem;
    background: var(--gradient-hero);
    opacity: 0.2;
    clip-path: polygon(
        73.6% 51.7%,
        91.7% 11.8%,
        100% 46.4%,
        97.4% 82.2%,
        92.5% 84.9%,
        75.7% 64%,
        55.3% 47.5%,
        46.5% 49.4%,
        45% 62.9%,
        50.3% 87.2%,
        21.3% 64.1%,
        0.1% 100%,
        5.4% 51.1%,
        21.4% 63.9%,
        58.9% 0.2%,
        73.6% 51.7%
    );
}

.hero__container {
    padding-bottom: var(--space-24);
    padding-top: var(--space-10);
}

@media (min-width: 640px) {
    .hero__container {
        padding-bottom: var(--space-32);
    }
}

@media (min-width: 1024px) {
    .hero__container {
        display: flex;
        padding-top: var(--space-40);
        padding-bottom: var(--space-40);
    }
}

.hero__content {
    max-width: 42rem;
    margin-left: auto;
    margin-right: auto;
    flex-shrink: 0;
}

@media (min-width: 1024px) {
    .hero__content {
        margin-left: 0;
        margin-right: 0;
        padding-top: var(--space-8);
    }
}

.hero__logo {
    width: auto;
    height: 2.5rem;
}

@media (min-width: 640px) {
    .hero__logo {
        height: 3rem;
    }
}

.hero__badge-row {
    display: inline-flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-6);
    margin-top: var(--space-24);
}

@media (min-width: 640px) {
    .hero__badge-row {
        margin-top: var(--space-32);
    }
}

@media (min-width: 1024px) {
    .hero__badge-row {
        margin-top: var(--space-16);
    }
}

.hero__version {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-300);
}

.hero__version a {
    color: inherit;
}

.hero__version a:hover {
    text-decoration: underline;
}

.hero__version .icon {
    color: var(--color-gray-500);
}

.hero__github-link {
    color: var(--color-gray-400);
    transition: all var(--transition-base);
}

.hero__github-link:hover {
    color: var(--color-gray-300);
    transform: scale(1.25);
}

.hero__title {
    margin-top: var(--space-10);
    font-size: var(--font-size-5xl);
    font-weight: var(--font-weight-semibold);
    letter-spacing: -0.025em;
    color: var(--color-white);
    text-wrap: pretty;
}

@media (min-width: 640px) {
    .hero__title {
        font-size: var(--font-size-7xl);
    }
}

.hero__subtitle {
    margin-top: var(--space-8);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-400);
    text-wrap: pretty;
}

@media (min-width: 640px) {
    .hero__subtitle {
        font-size: var(--font-size-xl);
        line-height: 2;
    }
}

.hero__image-wrapper {
    margin-top: var(--space-16);
    margin-left: auto;
    margin-right: auto;
    display: flex;
    max-width: 42rem;
}

@media (min-width: 640px) {
    .hero__image-wrapper {
        margin-top: var(--space-24);
    }
}

@media (min-width: 1024px) {
    .hero__image-wrapper {
        margin-left: var(--space-10);
        margin-right: 0;
        margin-top: 0;
        max-width: none;
        flex: none;
    }
}

@media (min-width: 1280px) {
    .hero__image-wrapper {
        margin-left: var(--space-32);
    }
}

.hero__image {
    width: 76rem;
    border-radius: var(--radius-md);
    background-color: var(--color-white-5);
    box-shadow: var(--shadow-2xl);
    border: 1px solid var(--color-white-10);
}

/* -----------------------------------------------------
   Section Base Styles
   ----------------------------------------------------- */
.section {
    margin-top: var(--space-32);
}

@media (min-width: 640px) {
    .section {
        margin-top: var(--space-56);
    }
}

.section__header {
    max-width: 42rem;
    margin-left: auto;
    margin-right: auto;
}

.section__header--center {
    text-align: center;
}

.section__eyebrow {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    line-height: 1.75;
    color: var(--color-indigo-400);
}

.section__title {
    margin-top: var(--space-2);
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-semibold);
    letter-spacing: -0.025em;
    color: var(--color-white);
    text-wrap: pretty;
}

@media (min-width: 640px) {
    .section__title {
        font-size: var(--font-size-5xl);
        text-wrap: balance;
    }
}

.section__subtitle {
    margin-top: var(--space-6);
    font-size: var(--font-size-lg);
    line-height: 2;
    color: var(--color-gray-300);
}

/* -----------------------------------------------------
   Cards
   ----------------------------------------------------- */
.cards {
    margin-top: var(--space-16);
}

@media (min-width: 640px) {
    .cards {
        margin-top: var(--space-20);
    }
}

@media (min-width: 1024px) {
    .cards {
        margin-top: var(--space-24);
    }
}

.cards--3col {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-16) var(--space-8);
    max-width: 36rem;
    margin-left: auto;
    margin-right: auto;
}

@media (min-width: 1024px) {
    .cards--3col {
        max-width: none;
        grid-template-columns: repeat(3, 1fr);
    }
}

.card {
    display: flex;
    flex-direction: column;
}

.card__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    margin-bottom: var(--space-6);
    border-radius: var(--radius-lg);
    background-color: var(--color-indigo-500);
    color: var(--color-white);
}

.card__icon svg {
    width: 1.25rem;
    height: 1.25rem;
}

.card__icon--large svg {
    width: 1.5rem;
    height: 1.5rem;
}

.card__title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    line-height: 1.75;
    color: var(--color-white);
}

.card__text {
    flex: 1;
    margin-top: var(--space-1);
    font-size: var(--font-size-base);
    line-height: 1.75;
    color: var(--color-gray-300);
}

.card__link {
    margin-top: var(--space-6);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    line-height: 1.5;
    color: var(--color-indigo-400);
    transition: color var(--transition-base);
}

.card__link:hover {
    color: var(--color-indigo-300);
}

/* Card variant for feature section */
.card--feature .card__text {
    flex: 1;
}

/* -----------------------------------------------------
   Feature Details Section
   ----------------------------------------------------- */
.feature-details__image-wrapper {
    position: relative;
    overflow: hidden;
    padding-top: var(--space-16);
}

.feature-details__image {
    margin-bottom: -1%;
    border-radius: var(--radius-xl);
}

.feature-details__image-fade {
    position: absolute;
    inset: 0 -5rem 0 -5rem;
    bottom: 0;
    background: var(--gradient-fade);
    padding-top: 7%;
    pointer-events: none;
}

/* Feature Grid */
.feature-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-10) var(--space-6);
    margin-top: var(--space-16);
    max-width: 42rem;
    margin-left: auto;
    margin-right: auto;
}

@media (min-width: 640px) {
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
        margin-top: var(--space-20);
    }
}

@media (min-width: 1024px) {
    .feature-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-16) var(--space-8);
        max-width: none;
        margin-top: var(--space-24);
    }
}

.feature-item {
    position: relative;
    padding-left: 2.25rem;
}

.feature-item__icon {
    position: absolute;
    left: 0.25rem;
    top: 0.25rem;
    width: 1.25rem;
    height: 1.25rem;
    color: var(--color-indigo-500);
}

.feature-item__title {
    display: inline;
    font-weight: var(--font-weight-semibold);
    color: var(--color-white);
}

.feature-item__desc {
    display: inline;
    font-size: var(--font-size-base);
    line-height: 1.75;
    color: var(--color-gray-300);
}

/* -----------------------------------------------------
   Video Section
   ----------------------------------------------------- */
.video-section {
    position: relative;
    overflow: hidden;
    padding-top: var(--space-16);
}

.video-wrapper {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    aspect-ratio: 16 / 9;
    max-width: 840px;
    margin: 0 auto;
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
    border-radius: var(--radius-lg);
}

/* -----------------------------------------------------
   Logo Cloud Section
   ----------------------------------------------------- */
.logo-cloud {
    margin-top: var(--space-8);
}

@media (min-width: 640px) {
    .logo-cloud {
        margin-top: var(--space-16);
    }
}

.logo-cloud__title {
    text-align: center;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    line-height: 2;
    color: var(--color-white);
}

.logo-cloud__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    align-items: center;
    gap: var(--space-10) var(--space-8);
    margin-top: var(--space-10);
}

@media (min-width: 1024px) {
    .logo-cloud__grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.logo-cloud__logo {
    width: 100%;
    height: 2.5rem;
    object-fit: contain;
}

.logo-cloud__logo--tall {
    height: 5rem;
}

@media (min-width: 1024px) {
    .logo-cloud__logo {
        grid-column: span 1;
    }
}

/* -----------------------------------------------------
   CTA Section
   ----------------------------------------------------- */
.cta {
    position: relative;
    isolation: isolate;
    padding: var(--space-32) var(--space-6);
}

@media (min-width: 640px) {
    .cta {
        padding: var(--space-40) var(--space-6);
    }
}

.cta__pattern {
    position: absolute;
    inset: 0;
    z-index: -10;
}

.cta__pattern svg {
    width: 100%;
    height: 100%;
    stroke: var(--color-white-10);
    mask-image: radial-gradient(100% 100% at top right, white, transparent);
}

.cta__pattern-shapes {
    overflow: visible;
    fill: rgba(31, 41, 55, 0.2);
}

.cta__gradient {
    position: absolute;
    inset: 0 0 auto 0;
    top: 2.5rem;
    z-index: -10;
    display: flex;
    justify-content: center;
    overflow: hidden;
    filter: blur(64px);
    transform: translateZ(0);
}

.cta__gradient-shape {
    aspect-ratio: 1108 / 632;
    width: 69.25rem;
    flex: none;
    background: var(--gradient-hero);
    opacity: 0.2;
    clip-path: polygon(
        73.6% 51.7%,
        91.7% 11.8%,
        100% 46.4%,
        97.4% 82.2%,
        92.5% 84.9%,
        75.7% 64%,
        55.3% 47.5%,
        46.5% 49.4%,
        45% 62.9%,
        50.3% 87.2%,
        21.3% 64.1%,
        0.1% 100%,
        5.4% 51.1%,
        21.4% 63.9%,
        58.9% 0.2%,
        73.6% 51.7%
    );
}

.cta__content {
    text-align: center;
    max-width: 42rem;
}

.cta__title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-semibold);
    letter-spacing: -0.025em;
    color: var(--color-white);
    text-wrap: balance;
}

@media (min-width: 640px) {
    .cta__title {
        font-size: var(--font-size-5xl);
    }
}

.cta__text {
    margin-top: var(--space-6);
    max-width: 36rem;
    margin-left: auto;
    margin-right: auto;
    font-size: var(--font-size-lg);
    line-height: 2;
    color: var(--color-gray-300);
}

.cta__buttons {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: var(--space-6);
    margin-top: var(--space-10);
}

/* -----------------------------------------------------
   Footer
   ----------------------------------------------------- */
.footer {
    position: relative;
    z-index: 10;
}

.footer__container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-8);
    padding: var(--space-12) var(--space-6);
    border-top: 1px solid var(--color-white-10);
}

@media (min-width: 768px) {
    .footer__container {
        flex-direction: row;
        justify-content: space-between;
    }
}

.footer__copyright {
    text-align: center;
    font-size: var(--font-size-sm);
    line-height: 1.5;
    color: var(--color-gray-400);
}

.footer__copyright a {
    transition: color var(--transition-base);
}

.footer__copyright a:hover {
    color: var(--color-gray-300);
}

.footer__github {
    color: var(--color-gray-400);
    transition: color var(--transition-base);
}

.footer__github:hover {
    color: var(--color-gray-300);
}

/* -----------------------------------------------------
   Accessibility & Reduced Motion
   ----------------------------------------------------- */
@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;
    }
}

/* Focus visible styles for keyboard navigation */
:focus-visible {
    outline: 2px solid var(--color-indigo-400);
    outline-offset: 2px;
}

/* Remove focus ring for mouse users */
:focus:not(:focus-visible) {
    outline: none;
}

/* -----------------------------------------------------
   Print Styles
   ----------------------------------------------------- */
@media print {
    .header,
    .hero__gradient,
    .cta__pattern,
    .cta__gradient,
    .video-section {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
    
    a {
        text-decoration: underline;
    }
}