/* ============================================
   DockSync — Main Styles
   ============================================ */

/* ---------- CSS Variables ---------- */
:root {
    /* Colors — Gray Scale */
    --gray-50:  #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;

    /* Colors — Orange */
    --orange-400: #FB923C;
    --orange-500: #FF6B35;
    --orange-600: #EA580C;

    /* Colors — Blue */
    --blue-400: #60A5FA;
    --blue-500: #2563EB;
    --blue-600: #1D4ED8;

    /* Semantic */
    --color-primary:    var(--orange-500);
    --color-primary-hover: var(--orange-600);
    --color-secondary:  var(--blue-500);
    --color-secondary-hover: var(--blue-600);
    --color-bg:         var(--gray-900);
    --color-bg-alt:     var(--gray-800);
    --color-text:       var(--gray-100);
    --color-text-muted: var(--gray-400);
    --color-border:     var(--gray-700);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --fs-xs:   0.75rem;
    --fs-sm:   0.875rem;
    --fs-base: 1rem;
    --fs-md:   1.125rem;
    --fs-lg:   1.25rem;
    --fs-xl:   1.5rem;
    --fs-2xl:  2rem;
    --fs-3xl:  2.5rem;
    --fs-4xl:  3.5rem;

    /* Spacing */
    --section-padding: 100px;
    --container-width: 1200px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

ul, ol {
    list-style: none;
}

/* ---------- Container ---------- */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- Highlight ---------- */
.highlight {
    background: linear-gradient(135deg, var(--orange-500), var(--blue-500));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ---------- Section Headers ---------- */
.section-header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 64px;
}

.section-label {
    display: inline-block;
    font-size: var(--fs-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--orange-500);
    margin-bottom: 16px;
}

.section-title {
    font-size: var(--fs-3xl);
    font-weight: 800;
    line-height: 1.2;
    color: var(--color-text);
    margin-bottom: 16px;
}

.section-description {
    font-size: var(--fs-md);
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--font-family);
    font-weight: 600;
    font-size: var(--fs-sm);
    padding: 12px 24px;
    border-radius: 8px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: background-color var(--transition-fast),
                border-color var(--transition-fast),
                color var(--transition-fast),
                transform var(--transition-fast);
    white-space: nowrap;
}

.btn--primary {
    background-color: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.btn--primary:hover {
    background-color: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
    transform: translateY(-1px);
}

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

.btn--outline:hover {
    border-color: var(--color-text-muted);
    transform: translateY(-1px);
}

.btn--ghost {
    background-color: transparent;
    color: var(--color-text-muted);
    border-color: transparent;
    padding: 12px 16px;
}

.btn--ghost:hover {
    color: var(--color-text);
}

.btn--lg {
    padding: 16px 32px;
    font-size: var(--fs-base);
}

.btn__icon {
    font-size: 0.75em;
}

/* ---------- Utility: Fade-in ---------- */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
    :root {
        --fs-4xl: 2.5rem;
        --fs-3xl: 2rem;
        --fs-2xl: 1.5rem;
        --section-padding: 72px;
    }

    .section-title {
        font-size: var(--fs-2xl);
    }
}