/* --- THEME & COLOR VARIABLES --- */
:root, html[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f7f7f7;
    --bg-card: #ffffff;
    --bg-panel: #f4f4f4;
    --text-primary: #374151;
    --text-strong: #111827;
    --text-inverse: #ffffff;
    --accent-primary: #0071e3;
    --accent-hover: #2997ff;
    --accent-gradient-start: #0077ff;
    --accent-gradient-end: #005fbb;
    --border-color: #e5e7eb;
    --hamburger-color: #111827;
    --logo-filter: invert(0);
    --header-bg-scrolled: rgba(255,255,255,0.7);
    --header-bg-image: url('https://jlinasdesign.com/-img/hdr_bg.png');
    --footer-bg-image: url('https://jlinasdesign.com/-img/footer_bg.png');
    --footer-bg-color: var(--bg-primary);
    --accent-secondary: #4A90E2;
}

html[data-theme="dark"] {
    --bg-primary: #000000;
    --bg-secondary: #050505;
    --bg-card: #1f2937;
    --bg-panel: #111827;
    --text-primary: #d1d5db;
    --text-strong: #ffffff;
    --text-inverse: #000000;
    --accent-primary: #2997ff;
    --accent-hover: #58afff;
    --accent-gradient-start: #4dabff;
    --accent-gradient-end: #2997ff;
    --border-color: #374151;
    --hamburger-color: #ffffff;
    --logo-filter: invert(1);
    --header-bg-scrolled: rgba(0,0,0,0.5);
    --header-bg-image: url('https://www.jlinasdesign.com/-img/hdr_bg_dark.png');
    --footer-bg-image: url('https://www.jlinasdesign.com/-img/footer_bg_dark.png');
    --footer-bg-color: var(--bg-secondary);
    --accent-secondary: #A4CDFF;
}

/* --- BASE & TYPOGRAPHY --- */
body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.4s ease, color 0.4s ease;
    line-height: 1.65;
}
.font-serif { font-family: 'Playfair Display', serif; }
h1, h2, h3, h4, h5, h6, .text-strong { color: var(--text-strong); }
p { max-width: 65ch; }

/* --- ANIMATIONS --- */
.gradient-text {
    background: linear-gradient(90deg, var(--accent-gradient-start), var(--accent-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-size: 200% auto;
    animation: gradient-flow 5s ease-in-out infinite;
}
@keyframes gradient-flow {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}
[data-animation] { opacity: 0; }
[data-animation="slide-up"] { transform: translateY(50px); }
.is-visible {
    opacity: 1;
    transform: translate(0, 0);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}
.split-text-wrapper { clip-path: polygon(0 0, 100% 0, 100% 100%, 0% 100%); display: inline-block; }
.split-text-word { display: inline-block; transform: translateY(110%); transition: transform 1.2s cubic-bezier(0.19, 1, 0.22, 1); }
.is-visible .split-text-word { transform: translateY(0); }
.line-by-line .line-wrapper { clip-path: polygon(0 0, 100% 0, 100% 100%, 0% 100%);}
.line-by-line .line { display: block; transform: translateY(110%); transition: transform 0.8s cubic-bezier(0.19, 1, 0.22, 1); }
.is-visible .line { transform: translateY(0); }
.animated { animation-fill-mode: both; animation-delay: .3s; }
@keyframes ae-animation-slide { from { opacity: 0; transform: translateY(100%); } to { opacity: 1; transform: translateY(0); } }
.ae-animation-slide { animation-name: ae-animation-slide; animation-duration: 1s; }
.slide-container { overflow: hidden; }
.parallax-bg { background-attachment: fixed; background-position: center; background-repeat: no-repeat; background-size: cover; position: relative; z-index: 1; }
.parallax-bg::before { content: ''; position: absolute; inset: 0; background-color: rgba(0, 0, 0, 0.5); z-index: -1; }

/* --- UI COMPONENTS --- */
.btn { display: inline-block; font-size: 1rem; font-weight: 600; text-align: center; border-radius: 9999px; padding: 16px 32px; transition: all 0.3s ease; cursor: pointer; }
.btn-primary { background-color: var(--accent-primary); color: var(--text-inverse); box-shadow: 0 4px 15px rgba(0, 113, 227, 0); }
.btn-primary:hover { background-color: var(--accent-hover); transform: scale(1.05); box-shadow: 0 8px 25px rgba(0, 113, 227, 0.4); }
.btn-secondary { background-color: transparent; color: var(--text-strong); border: 1px solid var(--border-color); }
html[data-theme="dark"] .btn-secondary { color: var(--text-primary); border: 1px solid var(--text-primary);}
.btn-secondary:hover { background-color: var(--text-strong); color: var(--bg-primary); }

/* --- HEADER & NAVIGATION --- */
header { transition: opacity 0.4s ease, transform 0.4s ease, background-color 0.4s ease, border-color 0.4s ease, backdrop-filter 0.4s ease; border-bottom: 1px solid transparent; }
header.is-hidden { opacity: 0; transform: translateY(-100%); pointer-events: none; }
header.header-scrolled {
    background-color: var(--header-bg-scrolled);
    background-image: var(--header-bg-image);
    background-repeat: repeat;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border-color: var(--border-color);
}
.slide-in-nav { position: fixed; top: 0; right: 0; width: 100%; max-width: 380px; height: 100vh; background-color: var(--bg-panel); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); z-index: 110; transform: translateX(100%); transition: transform 0.4s cubic-bezier(0.19, 1, 0.22, 1); }
.nav-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: 100; background-color: rgba(0,0,0,0.4); opacity: 0; pointer-events: none; transition: opacity 0.4s ease; }
.nav-open .slide-in-nav { transform: translateX(0); }
.nav-open .nav-overlay { opacity: 1; pointer-events: auto; }
.hamburger span { background-color: var(--hamburger-color); transition: all 0.3s cubic-bezier(0.19, 1, 0.22, 1); }
.nav-open .hamburger span:nth-child(1) { transform: rotate(45deg) translate(6px, 6px); }
.nav-open .hamburger span:nth-child(2) { opacity: 0; transform: translateX(-100%); }
.nav-open .hamburger span:nth-child(3) { transform: rotate(-45deg) translate(6px, -6px); }

/* --- MODALS & PANELS --- */
.slide-in-panel { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: 120; opacity: 0; pointer-events: none; transition: opacity 0.5s ease; background-color: rgba(0,0,0,0.5); }
.slide-in-panel.open { opacity: 1; pointer-events: auto; }
.slide-in-panel .panel-content { position: absolute; bottom: 0; left: 0; width: 100%; height: 100%; background-color: var(--bg-panel); color: var(--text-primary); overflow-y: auto; transform: translateY(100%); transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1); }
.slide-in-panel.open .panel-content { transform: translateY(0); }
.modal { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: 130; display: flex; align-items: center; justify-content: center; background-color: rgba(0,0,0,0.6); opacity: 0; pointer-events: none; transition: opacity 0.3s ease; }
.modal.open { opacity: 1; pointer-events: auto; }
.modal .modal-content { background-color: var(--bg-card); border-radius: 16px; padding: 32px; transform: scale(0.95); transition: transform 0.3s ease; width: calc(100% - 2rem); max-width: 400px; }
.modal.open .modal-content { transform: scale(1); }

/* --- HORIZONTAL SCROLL SECTION --- */
.horizontal-scroll-wrapper { position: relative; width: 100%; }
.horizontal-scroll-container { overflow: hidden; display: flex; position: sticky; top: 0; height: 100vh; align-items: center; }
.horizontal-scroll-track { display: flex; align-items: center; will-change: transform; }
.story-card {
    flex-shrink: 0; width: 85vw; max-width: 500px; height: 70vh;
    background-color: var(--bg-card); border: 1px solid var(--border-color);
    border-radius: 1.5rem; padding: 2rem 1.5rem;
    display: flex; flex-direction: column; justify-content: center;
    align-items: center; text-align: center; position: relative;
    overflow: hidden; transition: all 0.4s ease;
}
@media (min-width: 768px) { .story-card { padding: 2.5rem; } }
.story-card:hover { transform: scale(1.03); box-shadow: 0 0 40px rgba(0, 113, 227, 0.3); }
html[data-theme="dark"] .story-card::before {
    content: ''; position: absolute; inset: 0; pointer-events: none;
    background: radial-gradient(circle at 10% 10%, rgba(41, 151, 255, 0.1), transparent 30%);
    z-index: 1;
}
.story-card .card-content { z-index: 2; }

/* --- TESTIMONIALS --- */
#testimonials { background-color: var(--bg-secondary); overflow: hidden; }
.testimonial-item { position: absolute; inset: 0; opacity: 0; transition: opacity 0.6s ease-in-out, transform 0.6s ease-in-out; pointer-events: none; transform: translateX(20px); }
.testimonial-item.active { opacity: 1; pointer-events: auto; transform: translateX(0); }
.testimonial-selector { display: flex; justify-content: center; gap: 12px; }
.testimonial-selector button { width: 12px; height: 12px; border-radius: 50%; background-color: var(--border-color); transition: background-color 0.3s ease; border: none; }
.testimonial-selector button.active { background-color: var(--accent-primary); }

/* --- HERO SCENE --- */
@keyframes twinkle { 0% { opacity: 1; } 50% { opacity: 0.3; } 100% { opacity: 1; } }
@keyframes shimmer { 0%, 100% { opacity: 0.8; } 50% { opacity: 1; } }
@keyframes pulse { 0%, 100% { transform: scale(1); opacity: 0.4; } 50% { transform: scale(1.05); opacity: 0.6; } }

#hero-bg { transition: background 1s ease-in-out; overflow: hidden; }

/* Light mode: Rising sun effect */
#sunrise-glow { 
    position: absolute; bottom: -50%; left: 50%; 
    width: 200%; padding-top: 200%; 
    transform: translateX(-50%); 
    background: radial-gradient(circle, rgba(255, 215, 0, 0.25) 0%, rgba(255, 165, 0, 0.1) 30%, transparent 60%); 
    animation: pulse 8s ease-in-out infinite;
}

/* Dark mode: Moon and stars */
#moon { 
    position: absolute; top: 15%; right: 15%; 
    width: 60px; height: 60px; 
    background-color: #f5f3ff; border-radius: 50%; 
    box-shadow: 0 0 20px 0px #ffffff, 0 0 40px 10px rgba(245, 243, 255, 0.4), inset -10px 5px 10px -5px rgba(0,0,0,0.15);
    animation: shimmer 5s ease-in-out infinite;
}
.stars, .stars2, .stars3 { 
    position: absolute; top: 0; left: 0; width: 2px; height: 2px; 
    background: transparent; will-change: box-shadow;
}
.stars { animation: twinkle 10s linear infinite alternate; }
.stars2 { animation: twinkle 15s linear infinite alternate; animation-delay: -2s; }
.stars3 { animation: twinkle 20s linear infinite alternate; animation-delay: -5s; }

#hero .z-20 { position: relative; }

/* --- OTHER SECTIONS --- */
.snapshot-container { max-width: 800px; margin: 0 auto; text-align: center; }
.value-statement { font-size: 2rem; font-weight: 800; line-height: 1.2; margin-bottom: 1rem; color: var(--text-strong); }
@media (min-width: 768px) { .value-statement { font-size: 2.5rem; margin-bottom: 1.5rem; } }
.core-capabilities-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
@media (min-width: 768px) { .core-capabilities-grid { grid-template-columns: repeat(3, 1fr); gap: 2rem; } }
.capability-item { background-color: var(--bg-card); border-radius: 1rem; padding: 1.5rem 1rem; transition: transform 0.2s ease, background-color 0.2s ease; }
@media (min-width: 768px) { .capability-item { padding: 2rem; } }
.capability-item:hover { transform: translateY(-5px); background-color: var(--border-color); }
html[data-theme="dark"] .capability-item:hover { background-color: #2a2a2a; }
.capability-item h3 { font-size: 1.125rem; font-weight: 700; margin-bottom: 0.5rem; }
@media (min-width: 768px) { .capability-item h3 { font-size: 1.25rem; margin-bottom: 0.75rem; } }
.capability-item ul { list-style: none; padding: 0; line-height: 1.6; }
.capability-item ul li { font-size: 0.95rem; margin-bottom: 0.25rem; color: var(--text-primary); }
@media (min-width: 768px) { .capability-item ul li { font-size: 1rem; } }
footer { border-top: 1px solid var(--border-color); background-color: var(--footer-bg-color); background-image: var(--footer-bg-image); background-repeat: repeat; }