/* start-screen.css — cave diving (not even once)
   The title card, the briefing, and the touch START button. */

.title-screen {
    position: fixed;
    inset: 0;
    z-index: 60;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 14px;
    padding: 24px 18px;
    text-align: center;
    background: radial-gradient(ellipse at 50% 40%,
        rgba(9, 40, 50, 0.86) 0%,
        rgba(3, 11, 16, 0.95) 70%);
    overflow-y: auto;
}

.title-screen h1 {
    margin: 0;
    font-size: clamp(15px, 4.6vw, 30px);
    line-height: 1.5;
    letter-spacing: 0.06em;
    color: var(--accent);
    text-shadow: 0 0 14px rgba(63, 224, 208, 0.55);
}

.sub-title {
    font-size: 0.52em;
    color: var(--lamp);
    text-shadow: 0 0 10px rgba(255, 243, 196, 0.4);
}

.subtitle {
    margin: 0;
    font-size: clamp(7px, 1.9vw, 10px);
    color: var(--hud-dim);
    letter-spacing: 0.08em;
}

.controls-hint {
    font-size: 8px;
    line-height: 2;
    color: var(--hud-dim);
    letter-spacing: 0.06em;
}

.brief {
    display: flex;
    flex-direction: column;
    gap: 9px;
    max-width: 470px;
    text-align: left;
    padding: 12px 14px;
    border: 1px solid rgba(63, 224, 208, 0.28);
    background: rgba(7, 24, 32, 0.7);
}

.brief-row {
    display: flex;
    gap: 10px;
    align-items: flex-start;
}

.brief-mark {
    flex: 0 0 auto;
    font-size: 9px;
    line-height: 1.7;
}

.brief-mark.lamp { color: var(--lamp); }
.brief-mark.air { color: var(--air); }
.brief-mark.warn { color: var(--danger); }

.brief-text {
    font-size: 7px;
    line-height: 1.9;
    color: var(--hud-text);
}

.start-prompt {
    font-size: clamp(9px, 2.4vw, 12px);
    color: var(--lamp);
    letter-spacing: 0.1em;
    animation: blink 1.15s steps(2, start) infinite;
}

@keyframes blink {
    to { opacity: 0.25; }
}

/* Hidden on pointer-precise devices: the keyboard prompt above is the
   instruction there, and a button nobody needs is a button in the way. */
.touch-start {
    display: none;
    font-family: 'Press Start 2P', monospace;
    font-size: 11px;
    letter-spacing: 0.1em;
    color: var(--deep);
    background: var(--accent);
    border: none;
    padding: 18px 44px;
    /* 48px minimum. At 16px padding this came out 43px tall, just under the
       44px thumb target - the same trim makemecookies had to make. */
    min-height: 48px;
    cursor: pointer;
    touch-action: manipulation;
}

@media (hover: none), (pointer: coarse) {
    .touch-start { display: block; }
    .start-prompt { display: none; }
    .controls-hint { display: none; }
}

.copyright {
    margin: 0;
    font-size: 6px;
    color: var(--hud-dim);
    letter-spacing: 0.08em;
}

/* The mute state has to be visible BEFORE you dive.
   It persists across sessions, and the only other indicator is a label in the
   HUD that does not exist until a dive is under way - so a player who muted
   the game a week ago meets silence with no way to explain it. Tapping this is
   also the only way to mute on a phone, where there is no M key at all. */
.sound-toggle {
    font-family: 'Press Start 2P', monospace;
    font-size: 7px;
    letter-spacing: 0.1em;
    color: var(--hud-dim);
    background: transparent;
    border: 1px solid rgba(93, 122, 128, 0.5);
    padding: 9px 14px;
    min-height: 34px;
    cursor: pointer;
    touch-action: manipulation;
}

.sound-toggle:hover,
.sound-toggle:focus-visible {
    color: var(--hud-text);
    border-color: var(--hud-text);
    outline: none;
}

.sound-toggle[aria-pressed="true"] {
    color: var(--danger);
    border-color: rgba(255, 95, 109, 0.55);
}

@media (hover: none), (pointer: coarse) {
    .sound-toggle { min-height: 44px; padding: 12px 18px; font-size: 8px; }
}

/* Shown only when audio actually failed. Silence with no explanation is how
   ogg-only playback hid on iOS across four games. */
.audio-warning {
    margin: 0;
    max-width: 420px;
    font-size: 7px;
    line-height: 1.9;
    letter-spacing: 0.06em;
    color: var(--danger);
}