/* ── Retro Teletext Theme ── */

:root {
    --crt-bg: #0a0a0a;
    --crt-green: #33ff33;
    --crt-amber: #ffb000;
    --crt-cyan: #00ffff;
    --crt-white: #e0e0e0;
    --crt-dim: #555555;
    --crt-red: #ff3333;
    --bezel-color: #1a1a2e;
    --bezel-border: #2a2a4e;
    --glow-green: 0 0 8px rgba(51, 255, 51, 0.6);
    --glow-amber: 0 0 8px rgba(255, 176, 0, 0.6);
    --font-mono: 'VT323', 'Share Tech Mono', 'Courier New', monospace;
}

* {
    box-sizing: border-box;
}

body {
    background: #050510;
    font-family: var(--font-mono);
    color: var(--crt-white);
    margin: 0;
    padding: 0.4rem;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

/* ── CRT Monitor Container ── */

.crt-container {
    position: relative;
    background: var(--crt-bg);
    border: 3px solid var(--bezel-border);
    border-radius: 18px;
    box-shadow:
        0 0 30px rgba(51, 255, 51, 0.1),
        inset 0 0 60px rgba(0, 0, 0, 0.5),
        0 8px 32px rgba(0, 0, 0, 0.8);
    padding: 0.9rem;
    max-width: 820px;
    width: min(96vw, 820px);
    max-height: calc(100vh - 0.8rem);
    margin: 0;
    overflow: hidden;
}

.container {
    max-width: none;
    margin: 0;
    padding: 0;
}

/* ── Scanline Overlay ── */

.scanlines {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 10;
    background: repeating-linear-gradient(
        0deg,
        rgba(0, 0, 0, 0.15) 0px,
        rgba(0, 0, 0, 0.15) 1px,
        transparent 1px,
        transparent 3px
    );
    border-radius: 18px;
}

.crt-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(
        ellipse at center,
        transparent 60%,
        rgba(0, 0, 0, 0.4) 100%
    );
    pointer-events: none;
    z-index: 5;
    border-radius: 18px;
}

/* ── Navigation ── */

.teletext-nav {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.6rem;
    position: relative;
    z-index: 20;
}

.nav-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.lang-switch {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
    margin-top: 0.45rem;
}

.lang-btn {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--crt-white);
    text-decoration: none;
    border: 1px solid rgba(255, 255, 255, 0.25);
    background: rgba(255, 255, 255, 0.06);
    border-radius: 5px;
    padding: 0.1rem 0.45rem;
    transition: all 0.15s ease;
}

.lang-btn:hover {
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.5);
}

.lang-btn.active {
    color: var(--crt-cyan);
    border-color: var(--crt-cyan);
    box-shadow: 0 0 8px rgba(0, 255, 255, 0.5);
}

.nav-btn {
    font-family: var(--font-mono);
    font-size: 1.05rem;
    color: var(--crt-cyan);
    background: rgba(0, 255, 255, 0.08);
    border: 1px solid rgba(0, 255, 255, 0.3);
    border-radius: 6px;
    padding: 0.35rem 0.6rem;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.15s ease;
    text-shadow: var(--glow-green);
    white-space: nowrap;
}

.nav-btn:hover:not(.disabled) {
    background: rgba(0, 255, 255, 0.15);
    border-color: var(--crt-cyan);
    text-shadow: 0 0 12px rgba(0, 255, 255, 0.8);
    color: #ffffff;
}

.nav-btn.disabled {
    color: var(--crt-dim);
    border-color: rgba(85, 85, 85, 0.3);
    background: transparent;
    cursor: default;
    text-shadow: none;
    pointer-events: none;
}

.nav-btn-small {
    padding: 0.3rem 0.6rem;
    font-size: 1rem;
}

/* ── Page Input ── */

.page-input-group {
    position: relative;
}

.page-input {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    width: 3.5rem;
    text-align: center;
    background: rgba(255, 176, 0, 0.08);
    border: 2px solid var(--crt-amber);
    border-radius: 6px;
    color: var(--crt-amber);
    padding: 0.2rem;
    text-shadow: var(--glow-amber);
    caret-color: var(--crt-amber);
}

.page-input:focus {
    outline: none;
    border-color: var(--crt-amber);
    box-shadow: 0 0 12px rgba(255, 176, 0, 0.4);
    background: rgba(255, 176, 0, 0.12);
}

.page-input::placeholder {
    color: rgba(255, 176, 0, 0.3);
}

/* ── Subpage Indicator ── */

.sub-nav {
    align-items: center;
    gap: 0.5rem;
}

.sub-indicator {
    font-size: 1.1rem;
    color: var(--crt-green);
    text-shadow: var(--glow-green);
    min-width: 3rem;
    text-align: center;
}

/* ── Teletext Image ── */

.teletext-image-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    z-index: 20;
}

.teletext-image {
    width: min(100%, calc((100vh - 250px) * 1.025));
    max-height: calc(100vh - 250px);
    aspect-ratio: 1.025;
    object-fit: contain;
    image-rendering: pixelated;
    border-radius: 4px;
    box-shadow: 0 0 20px rgba(51, 255, 51, 0.15);
}

/* ── Not Found ── */

.page-not-found {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 400px;
    text-align: center;
    position: relative;
    z-index: 20;
}

.not-found-text {
    font-size: 1.5rem;
    color: var(--crt-red);
    text-shadow: 0 0 8px rgba(255, 51, 51, 0.6);
}

.glitch-text {
    font-size: 3rem;
    color: var(--crt-amber);
    text-shadow: var(--glow-amber);
    margin-bottom: 0.5rem;
    animation: glitch 2s infinite;
}

@keyframes glitch {
    0%, 90%, 100% { opacity: 1; transform: translate(0); }
    92% { opacity: 0.8; transform: translate(-2px, 1px); }
    94% { opacity: 0.9; transform: translate(2px, -1px); }
    96% { opacity: 0.7; transform: translate(-1px, -1px); }
}

/* ── Keyboard Hint ── */

.keyboard-hint {
    text-align: center;
    margin-top: 0.55rem;
    color: var(--crt-dim);
    font-size: 0.88rem;
    position: relative;
    z-index: 20;
}

.keyboard-hint kbd {
    font-family: var(--font-mono);
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 3px;
    padding: 0.1rem 0.4rem;
    font-size: 0.9rem;
    color: var(--crt-white);
}

/* ── Screen Reader Only ── */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ── Responsive ── */

@media (max-width: 600px) {
    body {
        align-items: flex-start;
        padding: 0;
    }

    .crt-container {
        width: 100vw;
        max-width: none;
        max-height: none;
        margin: 0;
        padding: 0.45rem;
        border-width: 1px;
        border-radius: 0;
    }

    .scanlines {
        border-radius: 0;
    }

    .crt-container::before {
        border-radius: 0;
    }

    .nav-btn {
        font-size: 0.95rem;
        padding: 0.25rem 0.4rem;
    }

    .nav-label {
        display: none;
    }

    .page-input {
        font-size: 1.3rem;
        width: 3rem;
    }

    .page-not-found {
        min-height: 220px;
    }

    .teletext-image {
        width: 100%;
        max-height: none;
    }
}