/* ═══════════════════════════════════════════
   ZLS LABORATORY - LANDING PAGE STYLES (Zero-G Technical)
   ═══════════════════════════════════════════ */

body.zls-landing {
    margin: 0;
    padding: 0;
    background-color: var(--bg-body);
    color: var(--clr-gray-300);
    font-family: var(--ff-cli);
    height: 100vh;
    overflow-x: hidden;
    overflow-y: auto; /* Fallback guard-rail if screen is extremely short */
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

/* CRT Scanline Effect Overlay */
.zls-landing::before {
    content: " ";
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.25) 50%), linear-gradient(90deg, rgba(255, 0, 0, 0.06), rgba(0, 255, 0, 0.02), rgba(0, 0, 255, 0.06));
    z-index: 2;
    background-size: 100% 2px, 3px 100%;
    pointer-events: none;
}

/* Glitch Red Scan Overlay - moves down slowly */
.zls-landing-scan {
    position: fixed; /* Prevents overflow-y expansion compared to absolute */
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: linear-gradient(to bottom, transparent 50%, rgba(255, 0, 0, 0.05) 51%, transparent 52%);
    background-size: 100% 4px;
    animation: landing-scan 8s linear infinite;
    z-index: 3;
    pointer-events: none;
}

@keyframes landing-scan {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(100%); }
}

/* Main Container */
.zls-landing-container {
    position: relative;
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    max-width: 1200px;
    padding: var(--sp-4);
}

/* Logo / Visual System (Image Fallback) */
.zls-landing-logo {
    width: 200px;
    height: auto;
    margin-bottom: var(--sp-6);
    opacity: 0;
    animation: fadeInLogo 2s ease-out forwards 1s;
}

@keyframes fadeInLogo {
    0% { opacity: 0; }
    100% { opacity: 0.8; }
}

/* ASCII Logo Renderer */
.zls-ascii-logo {
    font-family: var(--ff-cli);
    /* Guard-rail: scales with width (vw) but never exceeds height (vh) limits */
    font-size: clamp(3px, min(0.8vw, 0.6vh), 8px); 
    line-height: 1.1;
    white-space: pre;
    color: var(--clr-white);
    margin-bottom: var(--sp-6);
    text-align: center;
    opacity: 0;
    animation: fadeInLogo 2s ease-out forwards 0.5s;
    user-select: none;
}

.zls-ascii-red {
    color: var(--clr-red);
    text-shadow: 0 0 5px rgba(255,0,0,0.5);
}

.zls-ascii-white {
    color: var(--clr-white);
}

/* Hero Typography (Kinetic) */
.zls-landing-title {
    font-size: clamp(0.9rem, 2vw, 1.8rem);
    color: var(--clr-white);
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
    margin: 0 0 var(--sp-4) 0;
    text-align: center;
    letter-spacing: 0.05em;
    min-height: 1.2em; /* Prevents layout jump when typing */
    word-break: break-all; /* Allows long terminal strings without spaces to wrap gracefully on mobile */
    max-width: 90vw;
}

/* Blinking Cursor (CSS handles blinking to avoid JS layout shifts) */
.zls-cursor::after {
    content: '_';
    opacity: 1;
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    50% { opacity: 0; }
}

/* CTA Button */
.zls-landing-cta {
    display: inline-block;
    margin-top: var(--sp-6);
    padding: var(--sp-3) var(--sp-6);
    border: 1px solid var(--clr-red);
    background: transparent;
    color: var(--clr-red);
    font-family: var(--ff-cli);
    font-size: var(--fs-base);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    text-decoration: none;
    cursor: pointer;
    transition: background 0.2s, color 0.2s, box-shadow 0.2s, text-shadow 0.2s, opacity 0.5s, transform 0.5s;
    position: relative;
    overflow: hidden;
    opacity: 0.2; /* Always visible but dimmed */
    pointer-events: none;
    transform: translateY(10px);
}

.zls-landing-cta.is-ready {
    opacity: 1;
    pointer-events: all;
    transform: translateY(0);
}

/* System Progress Bar */
.zls-sys-progress {
    font-family: var(--ff-cli);
    color: var(--clr-gray-400);
    margin-bottom: var(--sp-2);
    font-size: clamp(1rem, 2vw, 1.5rem);
    text-align: center;
    letter-spacing: 0.1em;
    min-height: 1.5em;
    opacity: 0;
    transition: opacity 0.3s;
}

.zls-sys-progress.is-active {
    opacity: 1;
}

/* System Status Message */
.zls-sys-status {
    font-family: var(--ff-cli);
    color: var(--clr-gray-300);
    margin-bottom: var(--sp-6);
    font-size: clamp(0.9rem, 1.8vw, 1.3rem);
    text-align: center;
    letter-spacing: 0.2em;
    min-height: 1.5em;
    opacity: 0;
    transition: opacity 0.3s;
}

.zls-sys-status.is-active {
    opacity: 1;
}

.zls-text-blink {
    animation: textPulse 1s infinite alternate;
}
@keyframes textPulse {
    0% { opacity: 0.5; color: var(--clr-white); }
    100% { opacity: 1; color: var(--clr-red); }
}

@keyframes fadeInUp {
    0% { opacity: 0; transform: translateY(20px); }
    100% { opacity: 1; transform: translateY(0); }
}

.zls-landing-cta:hover {
    background: var(--clr-red);
    color: var(--clr-white);
    box-shadow: 0 0 15px rgba(255, 0, 0, 0.5);
    text-shadow: 0 0 4px rgba(255,255,255,0.8);
}

.zls-landing-cta::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;
}

.zls-landing-cta:hover::before {
    left: 100%;
}

/* Telemetry Widgets (Corners) */
.zls-telemetry {
    position: absolute;
    font-family: var(--ff-cli);
    font-size: var(--fs-micro);
    color: var(--clr-gray-400);
    letter-spacing: 0.1em;
    pointer-events: none;
    opacity: 0;
    animation: fadeIn 1s forwards 1.5s;
}

.zls-telemetry--tl { top: var(--sp-4); left: var(--sp-4); }
.zls-telemetry--tr { top: var(--sp-4); right: var(--sp-4); text-align: right; }
.zls-telemetry--bl { bottom: var(--sp-4); left: var(--sp-4); }
.zls-telemetry--br { bottom: var(--sp-4); right: var(--sp-4); text-align: right; }

.zls-telemetry span {
    display: block;
    margin-bottom: 2px;
}

@keyframes fadeIn {
    to { opacity: 0.6; }
}

/* Page Transition Overlay */
.zls-transition-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-body);
    z-index: 9999;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.zls-transition-overlay.is-active {
    opacity: 1;
    pointer-events: all;
}