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

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    font-size: var(--text-base);
    line-height: 1.7;
    color: var(--text-secondary);
    background: var(--bg-primary);
    overflow-x: hidden;
}

/* ===================================
   TYPOGRAPHY
   =================================== */

h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-4);
}

h1 {
    font-size: clamp(var(--text-4xl), 5vw, var(--text-6xl));
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl));
    letter-spacing: -0.01em;
}

h3 {
    font-size: clamp(var(--text-2xl), 3vw, var(--text-3xl));
}

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

p {
    margin-bottom: var(--space-4);
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--accent-dark);
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4) var(--space-8);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: var(--text-base);
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-dark) 100%);
    color: var(--bg-primary);
    box-shadow: 0 4px 12px rgba(217, 119, 6, 0.3);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--accent-dark) 0%, var(--accent-darker) 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(217, 119, 6, 0.5), var(--shadow-glow);
}

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

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--executive-steel);
    position: relative;
    overflow: hidden;
}

.btn-secondary::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: var(--executive-graphite);
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
    z-index: -1;
}

.btn-secondary:hover::before {
    width: 300%;
    height: 300%;
}

.btn-secondary:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===================================
   SECTION LAYOUT
   =================================== */

.section {
    padding: var(--space-24) var(--space-6);
    position: relative;
}

.section-alt {
    background: var(--bg-secondary);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-16);
}

.section-label {
    display: inline-block;
    padding: var(--space-2) var(--space-4);
    background: linear-gradient(135deg, var(--executive-graphite) 0%, var(--executive-steel) 100%);
    color: var(--accent-primary);
    font-size: var(--text-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
    border: 1px solid var(--executive-steel);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.section-label:hover {
    box-shadow: var(--shadow-glow);
    transform: scale(1.05);
}

.section-title {
    margin-bottom: var(--space-4);
}

.section-description {
    font-size: var(--text-lg);
    color: var(--text-tertiary);
}

/* ===================================
   ANIMATIONS
   =================================== */

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

@keyframes slideInFromLeft {
    from {
        opacity: 0;
        transform: translateX(-40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleReveal {
    from {
        opacity: 0;
        transform: scale(0.92);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* ===================================
   SCROLL-DRIVEN ANIMATIONS (2026)
   Progressive enhancement: older
   browsers show static content.
   =================================== */

@supports (animation-timeline: view()) {
    /* Cards fade up and scale in as they enter the viewport */
    .review-card,
    .blog-card {
        animation: scaleReveal linear both;
        animation-timeline: view();
        animation-range: entry 0% entry 100%;
    }

    /* Section headers slide in */
    .section-header {
        animation: fadeInUp linear both;
        animation-timeline: view();
        animation-range: entry 0% entry 80%;
    }

    /* Principles slide from left */
    .principle {
        animation: slideInFromLeft linear both;
        animation-timeline: view();
        animation-range: entry 0% entry 70%;
    }

    /* About text paragraphs fade in */
    .about-text p {
        animation: fadeInUp linear both;
        animation-timeline: view();
        animation-range: entry 0% entry 80%;
    }

    /* Contact form slides up */
    .contact-form {
        animation: fadeInUp linear both;
        animation-timeline: view();
        animation-range: entry 0% entry 80%;
    }

    /* Footer content slides up */
    .footer-content {
        animation: fadeInUp linear both;
        animation-timeline: view();
        animation-range: entry 0% entry 90%;
    }
}

/* ===================================
   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;
    }

    /* Ensure scroll-driven animations are also disabled */
    .review-card,
    .blog-card,
    .section-header,
    .principle,
    .about-text p,
    .contact-form,
    .footer-content {
        animation: none !important;
        opacity: 1 !important;
        transform: none !important;
    }
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--accent-primary);
    color: var(--bg-primary);
    padding: var(--space-2) var(--space-4);
    z-index: 100;
}

.skip-link:focus {
    top: 0;
}

/* ===================================
   RESPONSIVE - BASE
   =================================== */

@media (max-width: 768px) {
    :root {
        --space-24: 4rem;
    }

    .btn {
        width: 100%;
    }
}