/* KAMDRIDI INTRO — ATMOSPHERIC CINEMA */

#intro-screen {
    position: fixed;
    inset: 0;
    background: #000;
    z-index: 1000;
    overflow: hidden;
}

#intro-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
}

#intro-layers {
    position: fixed;
    inset: 0;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    pointer-events: none;
}

/* Pure black beginning */
.intro-el {
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.6s ease-in-out;
    font-family: 'Share Tech Mono', monospace;
    color: #C9952A;
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.intro-el.show { opacity: 1; }

/* KAMDRIDI PRESENTS - minimal, distant */
#intro-presents {
    font-size: clamp(8px, 1vw, 11px);
    letter-spacing: 0.2em;
    color: #C9952A;
    opacity: 0;
    animation: fadeInDistant 1.2s ease-out forwards;
}

@keyframes fadeInDistant {
    0% { opacity: 0; filter: blur(4px); }
    100% { opacity: 0.35; filter: blur(0); }
}

/* SIGNAL LINES - stuttering appearance */
#intro-signal {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    opacity: 0;
}

#intro-signal.show {
    opacity: 1;
}

.signal-line {
    font-size: clamp(7px, 0.9vw, 10px);
    color: #C9952A;
    letter-spacing: 0.1em;
    opacity: 0;
    transform: translateY(2px);
    animation: signalGlitch 0.5s ease-out forwards;
    line-height: 1.4;
}

.signal-line:nth-child(1) { animation-delay: 0s; }
.signal-line:nth-child(2) { animation-delay: 0.3s; }
.signal-line:nth-child(3) { animation-delay: 0.6s; }
.signal-line:nth-child(4) { animation-delay: 0.9s; }

@keyframes signalGlitch {
    0% { opacity: 0; transform: translateY(2px) scaleX(0.95); }
    100% { opacity: 0.4; transform: translateY(0) scaleX(1); }
}

/* LOGO - sacred reveal */
#intro-logo {
    position: relative;
    margin: 40px 0;
    opacity: 0;
    animation: logoReveal 3s ease-out forwards;
}

#logo-img {
    width: clamp(180px, 35vw, 400px);
    height: auto;
    filter: brightness(0) drop-shadow(0 20px 40px rgba(0,0,0,0.9));
    transition: filter 2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

#logo-img.revealed {
    filter: brightness(1) contrast(1.1) drop-shadow(0 10px 30px rgba(201, 149, 42, 0.4));
}

#logo-glow {
    position: absolute;
    inset: -40%;
    background: radial-gradient(ellipse at center, rgba(201, 149, 42, 0.08) 0%, transparent 70%);
    opacity: 0;
    pointer-events: none;
    animation: glowAwaken 3s ease-out forwards;
}

@keyframes logoReveal {
    0% { opacity: 0; transform: scale(0.95) translateY(20px); }
    100% { opacity: 1; transform: scale(1) translateY(0); }
}

@keyframes glowAwaken {
    0% { opacity: 0; }
    50% { opacity: 0.5; }
    100% { opacity: 1; animation: glowBreathing 2.5s ease-in-out infinite; }
}

@keyframes glowBreathing {
    0%, 100% { transform: scale(1); opacity: 0.6; }
    50% { transform: scale(1.08); opacity: 1; }
}

/* TITLE - reveal after logo */
#intro-title {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    margin: 30px 0;
    opacity: 0;
}

#intro-title.show { opacity: 1; }

#title-main {
    font-size: clamp(28px, 5vw, 48px);
    font-family: 'Bebas Neue', sans-serif;
    letter-spacing: 0.12em;
    color: #C9952A;
    font-weight: 300;
    text-shadow: 0 0 30px rgba(201, 149, 42, 0.25), 0 0 60px rgba(201, 149, 42, 0.1);
    animation: titleGlide 1s ease-out forwards;
}

#intro-title.show #title-main { animation: titleStay 0.5s ease-out; }

@keyframes titleGlide {
    0% { opacity: 0; transform: translateY(10px); }
    100% { opacity: 1; transform: translateY(0); }
}

@keyframes titleStay {
    0% { text-shadow: 0 0 30px rgba(201, 149, 42, 0.25), 0 0 60px rgba(201, 149, 42, 0.1); }
    100% { text-shadow: 0 0 20px rgba(201, 149, 42, 0.15), 0 0 40px rgba(201, 149, 42, 0.05); }
}

#title-sub {
    font-size: clamp(9px, 1.2vw, 12px);
    letter-spacing: 0.2em;
    color: #A89878;
    opacity: 0.35;
    font-weight: 300;
}

/* SYSTEM LINES - minimal */
#intro-system {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    margin-top: 30px;
    opacity: 0;
}

#intro-system.show { opacity: 1; }

.sys-line {
    font-size: clamp(7px, 0.9vw, 9px);
    color: #C9952A;
    letter-spacing: 0.1em;
    opacity: 0;
    animation: sysAppear 0.4s ease-out forwards;
}

.sys-line:nth-child(1) { animation-delay: 0s; }
.sys-line:nth-child(2) { animation-delay: 0.2s; }
.sys-line:nth-child(3) { animation-delay: 0.4s; }
.sys-line:nth-child(4) { animation-delay: 0.6s; }

@keyframes sysAppear {
    0% { opacity: 0; }
    100% { opacity: 0.3; }
}

/* BUTTON - final activation */
#btn-start {
    margin-top: 40px;
    padding: 12px 32px;
    background: transparent;
    border: 1px solid rgba(201, 149, 42, 0.25);
    color: #C9952A;
    font-family: 'Share Tech Mono', monospace;
    font-size: clamp(9px, 1.1vw, 11px);
    letter-spacing: 0.15em;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    opacity: 0;
    pointer-events: none;
    text-transform: uppercase;
    background-clip: padding-box;
}

#btn-start.show {
    opacity: 1;
    pointer-events: auto;
}

#btn-start:hover {
    background: rgba(201, 149, 42, 0.04);
    border-color: #C9952A;
    box-shadow: 0 0 20px rgba(201, 149, 42, 0.2), inset 0 0 20px rgba(201, 149, 42, 0.05);
}

#btn-start:active {
    transform: scale(0.98);
}

/* ATMOSPHERE - fade to game */
@keyframes fadeToGame {
    0% { opacity: 1; }
    100% { opacity: 0; pointer-events: none; }
}

#intro-screen.exit-protocol {
    animation: fadeToGame 0.8s ease-out forwards;
}