/* YONS.io - Terminal Theme */

:root {
    --terminal-bg: #2b2b2b;
    --terminal-text: #00ff00;
    --terminal-text-dim: #00cc00;
    --terminal-text-bright: #33ff33;
    --terminal-glow: rgba(0, 255, 0, 0.15);
    --border-color: #e0e0e0;
    --outer-bg: #111111;
    --prompt-bg: #1a1a1a;
    --error-color: #ff4444;
}

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

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: 'IBM Plex Mono', 'Courier New', monospace;
    background-color: var(--outer-bg);
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Outer white-bordered terminal frame */
.typewriter-container {
    display: flex;
    flex-direction: column;
    width: 100%;
    height: 100%;
    max-width: 960px;
    max-height: 95vh;
    margin: 20px;
    border: 3px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    box-shadow:
        0 0 30px rgba(255, 255, 255, 0.05),
        0 8px 32px rgba(0, 0, 0, 0.5);
}

/* Main terminal screen */
.paper-sheet {
    flex: 1;
    background-color: var(--terminal-bg);
    position: relative;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 40px 50px;
    scroll-behavior: smooth;
}

/* Subtle scanline effect */
.paper-sheet::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(
        to bottom,
        transparent 0px,
        transparent 2px,
        rgba(0, 0, 0, 0.08) 2px,
        rgba(0, 0, 0, 0.08) 4px
    );
    pointer-events: none;
    z-index: 2;
}

/* WebGL canvas for effects */
#webgl-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0;
}

/* Text layer for typewriter output */
.text-layer {
    position: relative;
    z-index: 1;
    color: var(--terminal-text);
    font-size: 18px;
    line-height: 28px;
    white-space: pre-wrap;
    word-wrap: break-word;
    padding-bottom: 40px;
    text-shadow: 0 0 8px var(--terminal-glow);
}

/* Title container */
.text-layer .title {
    margin-bottom: 28px;
    line-height: 1.2;
}

/* IBM 8-bar logo SVG */
.ibm-logo-svg {
    width: 380px;
    height: auto;
    display: block;
    opacity: 0;
    animation: logoReveal 0.6s ease-out forwards;
}

.ibm-logo-svg rect {
    fill: var(--terminal-text);
}

@keyframes logoReveal {
    0% {
        opacity: 0;
        clip-path: inset(0 100% 0 0);
    }
    100% {
        opacity: 1;
        clip-path: inset(0 0 0 0);
    }
}

/* Subtitle text under logo */
.text-layer .subtitle {
    font-size: 14px;
    font-weight: 400;
    letter-spacing: 6px;
    text-transform: uppercase;
    color: var(--terminal-text-dim);
    margin-top: 8px;
    margin-bottom: 28px;
    text-shadow: 0 0 6px var(--terminal-glow);
}

.text-layer .line {
    display: block;
    min-height: 28px;
}

/* Typewriter character animation */
.text-layer .char {
    display: inline;
    opacity: 0;
    animation: typeIn 0.05s forwards;
}

@keyframes typeIn {
    0% {
        opacity: 0;
        transform: translateY(-2px);
    }
    50% {
        opacity: 1;
        transform: translateY(1px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Slight glow variation on characters */
.text-layer .char.heavy {
    text-shadow: 0 0 12px var(--terminal-glow), 0 0 4px var(--terminal-text);
}

.text-layer .char.light {
    opacity: 0.75;
}

/* Clickable menu options */
.text-layer .menu-option {
    cursor: pointer;
    transition: text-shadow 0.15s;
}

.text-layer .menu-option:hover {
    text-shadow: 0 0 12px var(--terminal-glow), 0 0 6px var(--terminal-text);
}

.text-layer .menu-option:active {
    text-shadow: 0 0 16px var(--terminal-glow), 0 0 8px var(--terminal-text);
}

/* Command prompt styling */
.command-prompt {
    display: flex;
    align-items: center;
    background-color: var(--prompt-bg);
    padding: 15px 20px;
    font-family: 'IBM Plex Mono', monospace;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.prompt-symbol {
    color: var(--terminal-text);
    font-size: 18px;
    font-weight: 700;
    margin-right: 4px;
    text-shadow: 0 0 10px var(--terminal-glow);
    flex-shrink: 0;
}

.command-input {
    background: transparent;
    border: none;
    outline: none;
    color: var(--terminal-text);
    font-family: inherit;
    font-size: 18px;
    caret-color: var(--terminal-text);
    text-shadow: 0 0 5px var(--terminal-glow);
    width: 0;
    flex: 1;
    min-width: 0;
}

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

/* Blinking cursor */
.cursor {
    display: inline-block;
    width: 10px;
    height: 20px;
    background-color: var(--terminal-text);
    animation: blink 1s step-end infinite;
    box-shadow: 0 0 10px var(--terminal-glow);
    flex-shrink: 0;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

/* Suggestion form mode */
.command-prompt.suggest-mode {
    flex-direction: column;
    align-items: stretch;
    padding: 12px 20px;
}

.suggest-form {
    width: 100%;
    color: var(--terminal-text);
}

.suggest-title {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 0 0 8px var(--terminal-glow);
}

.suggest-field {
    margin-bottom: 8px;
}

.suggest-field label {
    display: block;
    font-size: 12px;
    color: var(--terminal-text-dim);
    margin-bottom: 2px;
}

.suggest-input {
    width: 100%;
    background: transparent;
    border: 1px solid rgba(0, 255, 0, 0.3);
    border-radius: 2px;
    padding: 6px 8px;
    color: var(--terminal-text);
    font-family: inherit;
    font-size: 16px;
    outline: none;
    caret-color: var(--terminal-text);
}

.suggest-input:focus {
    border-color: var(--terminal-text);
}

.suggest-textarea {
    resize: vertical;
    min-height: 48px;
}

.suggest-actions {
    margin-top: 6px;
}

.suggest-hint {
    font-size: 12px;
    color: var(--terminal-text-dim);
}

/* Scroll animation for page transitions */
.paper-sheet.scrolling-out .text-layer {
    animation: scrollUp 0.5s ease-in forwards;
}

@keyframes scrollUp {
    0% {
        transform: translateY(0);
        opacity: 1;
    }
    100% {
        transform: translateY(-100%);
        opacity: 0;
    }
}

.paper-sheet.scrolling-in .text-layer {
    animation: scrollIn 0.5s ease-out forwards;
}

@keyframes scrollIn {
    0% {
        transform: translateY(100%);
        opacity: 0;
    }
    100% {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Dot-matrix image effect */
.dot-matrix-image {
    image-rendering: pixelated;
    filter: contrast(1.1) brightness(0.95);
    position: relative;
}

.dot-matrix-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle, var(--terminal-text) 1px, transparent 1px);
    background-size: 3px 3px;
    mix-blend-mode: multiply;
    opacity: 0.3;
}

/* Response/error message styling */
.response {
    color: var(--terminal-text);
    margin-top: 14px;
    padding-left: 20px;
    border-left: 2px solid var(--terminal-text-dim);
}

.error {
    color: var(--error-color);
    text-shadow: 0 0 8px rgba(255, 68, 68, 0.3);
}

/* Loading state */
.loading .text-layer::after {
    content: '_';
    animation: blink 0.5s step-end infinite;
}

/* ── Mobile Responsive ───────────────────────────────────────────────────── */

@media (max-width: 768px) {
    .typewriter-container {
        margin: 0;
        max-height: 100vh;
        border-radius: 0;
        border: none;
    }

    .paper-sheet {
        padding: 20px 16px;
    }

    .text-layer {
        font-size: 15px;
        line-height: 24px;
        padding-bottom: 20px;
    }

    .ibm-logo-svg {
        width: 260px;
    }

    .text-layer .subtitle {
        font-size: 12px;
        letter-spacing: 4px;
    }

    .text-layer .title {
        margin-bottom: 18px;
    }

    .response {
        margin-top: 10px;
        padding-left: 12px;
    }

    .text-layer .menu-option {
        padding: 4px 0;
        -webkit-tap-highlight-color: rgba(0, 255, 0, 0.1);
    }

    .command-prompt {
        padding: 12px 12px;
    }

    .prompt-symbol {
        font-size: 16px;
    }

    .command-input {
        font-size: 16px;
    }

    .cursor {
        width: 8px;
        height: 18px;
    }

    .suggest-input {
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .paper-sheet {
        padding: 14px 12px;
    }

    .text-layer {
        font-size: 14px;
        line-height: 22px;
    }

    .ibm-logo-svg {
        width: 200px;
    }

    .text-layer .subtitle {
        font-size: 11px;
        letter-spacing: 3px;
    }
}