:root {
    /* SIMP Theme Colors */
    --true-black: #000000;
    --stealth-black: #0F0F12;
    --surface-gray: #1A1A1A;
    --elevated-gray: #2A2A2A;

    --caution-yellow: #FFD700;
    /* Cyber Gold */
    --muted-yellow: #B8960B;
    --destroyed-red: #DC143C;
    --fresh-green: #32CD32;
    --obsessed-orange: #FF6B35;

    --text-primary: #FFFFFF;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-tertiary: rgba(255, 255, 255, 0.4);

    /* Spacing */
    --container-padding: 2rem;
    --max-width: 1200px;

    /* Animation */
    --ease-out: cubic-bezier(0.215, 0.61, 0.355, 1);
    --ease-in-out: cubic-bezier(0.645, 0.045, 0.355, 1);
}

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

body {
    background-color: var(--true-black);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    line-height: 1.6;
    overflow-x: hidden;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 800;
    /* Heavy */
    text-transform: uppercase;
    letter-spacing: 0.05em;
    line-height: 1.2;
}

h1 {
    font-size: clamp(3rem, 5vw, 5rem);
    letter-spacing: 0.1em;
}

h2 {
    font-size: 2.5rem;
    color: var(--caution-yellow);
    margin-bottom: 2rem;
    text-align: center;
}

p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    color: var(--text-secondary);
}

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

a:hover {
    color: var(--muted-yellow);
}

/* Layout Utilities */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.section {
    padding: 6rem 0;
}

/* Component: Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-radius: 4px;
    transition: all 0.3s var(--ease-out);
    cursor: pointer;
    font-size: 1rem;
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--caution-yellow);
    color: var(--true-black);
}

.btn-primary:hover {
    background-color: var(--muted-yellow);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
}

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

.btn-outline:hover {
    background-color: rgba(255, 215, 0, 0.1);
}

/* Component: Cards */
.simp-card {
    background-color: var(--surface-gray);
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid transparent;
    transition: all 0.3s var(--ease-out);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.simp-card:hover {
    border-color: var(--caution-yellow);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.simp-card h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 900;
    font-size: 1.5rem;
    letter-spacing: 0.2em;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo span {
    color: var(--caution-yellow);
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
}

.nav-links a:hover {
    color: var(--text-primary);
}

.nav-cta {
    padding: 0.5rem 1.5rem;
    font-size: 0.8rem;
}

/* Splash Screen (Monolith) */
#splash-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--stealth-black);
    z-index: 2000;
    display: flex;
    justify-content: center;
    align-items: center;
    pointer-events: none;
    /* Allow scrolling underneath if needed? No, blocks it initially */
}

.monolith-line {
    position: absolute;
    background-color: var(--caution-yellow);
    width: 2px;
    height: 0;
    /* Starts at 0 */
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.6);
}

.splash-content {
    opacity: 0;
    transform: scale(0.8);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.splash-logo {
    font-size: 4rem;
    font-weight: 900;
    letter-spacing: 0.5em;
    color: var(--text-primary);
    margin-bottom: 1rem;
    text-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

.splash-subtext {
    font-family: monospace;
    color: var(--caution-yellow);
    letter-spacing: 0.3em;
    font-weight: 700;
    opacity: 0;
}

/* Footer */
footer {
    background-color: var(--surface-gray);
    padding: 4rem 0;
    border-top: 1px solid var(--elevated-gray);
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 4rem;
}

.footer-column h4 {
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.footer-column ul {
    list-style: none;
}

.footer-column li {
    margin-bottom: 0.8rem;
}

.footer-column a {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-bottom {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--elevated-gray);
    text-align: center;
    color: var(--text-tertiary);
    font-size: 0.8rem;
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 2rem;
    }

    .nav-links {
        display: none;
    }

    /* Simplified for MVP */
}

/* Utilities */
.app-icon {
    border-radius: 22%;
    /* iOS standard squircle approx */
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.screenshot-container {
    perspective: 1000px;
    display: flex;
    justify-content: center;
    padding: 4rem 0;
}

.screenshot-frame {
    width: 320px;
    height: auto;
    border-radius: 40px;
    border: 8px solid var(--elevated-gray);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8);
    transform: rotateY(-10deg) rotateX(5deg);
    transition: transform 0.5s var(--ease-out);
    overflow: hidden;
}

.screenshot-frame:hover {
    transform: rotateY(0) rotateX(0) scale(1.05);
    z-index: 10;
}

.screenshot-frame img {
    width: 100%;
    height: auto;
    display: block;
}