/*
 * QMB Keyboard Mastery — Light the Keys
 * File: /qmbportal/quizzes/assets/css/keyboard_mastery.css
 *
 * v1.2 — white glow fix + modal CSS import
 * Tokens only — no raw hex. Source: tokens.css
 * Session: S018 v1.2
 */

/* Modal overlay — required for student name modal + completion modal display:none */
@import url('components/modal.css');

body {
    background: linear-gradient(160deg,
        color-mix(in srgb, var(--color-plum) 80%, #000 20%) 0%,
        color-mix(in srgb, var(--color-blue) 50%, #000 50%) 100%
    );
    min-height: 100vh;
    padding: var(--spacing-xl);
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
}

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    background: var(--bg-primary);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    position: relative;
    will-change: transform;
    transform: translateZ(0);
}

.container::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 6px;
    background: linear-gradient(90deg,
        var(--color-plum),
        var(--color-blue),
        var(--color-sunflower),
        var(--color-tangerine)
    );
    border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
}

.kbm-app {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    background: linear-gradient(180deg,
        color-mix(in srgb, var(--color-plum) 6%, var(--bg-primary) 94%) 0%,
        var(--bg-primary) 100%
    );
    min-height: 70vh;
}

.kbm-tagline {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    color: var(--color-medium-gray);
    margin: 0;
    text-align: center;
}

.kbm-mode-badge {
    display: inline-block;
    font-family: var(--font-display);
    font-size: var(--text-sm);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    color: var(--color-white);
    background: var(--color-subject-skills);
}

.kbm-mode-badge[data-mode="explore"] { background: var(--color-tangerine); }

.kbm-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;
}

/* ---- Feedback + restart ---- */
.kbm-feedback-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    min-height: 4rem;
}

.kbm-feedback {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: 700;
    text-align: center;
    color: var(--color-success);
    transition: opacity var(--transition-fast);
    min-height: 2.25rem;
}

.kbm-feedback.fade-out { opacity: 0; }

.kbm-restart-btn {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 700;
    padding: var(--spacing-sm) var(--spacing-xl);
    border-radius: var(--radius-full);
    border: none;
    background: var(--color-subject-skills);
    color: var(--color-white);
    cursor: pointer;
    transition: transform var(--transition-bounce), box-shadow var(--transition-normal);
    box-shadow: var(--shadow-md);
}

.kbm-restart-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.kbm-hidden { display: none !important; }

/* ---- Companion ---- */
.kbm-companion {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 3.5rem;
    height: 3.5rem;
    border-radius: var(--radius-full);
}

.glow-body {
    font-size: 2rem;
    line-height: 1;
    filter: drop-shadow(0 0 6px var(--color-sunflower));
    transition: filter var(--transition-normal);
}

.kbm-companion.hop {
    animation: kbm-hop 0.4s var(--transition-bounce) forwards;
}

@keyframes kbm-hop {
    0%   { transform: translateY(0)     scale(1); }
    40%  { transform: translateY(-14px) scale(1.15); }
    70%  { transform: translateY(-8px)  scale(1.05); }
    100% { transform: translateY(0)     scale(1); }
}

.kbm-companion.brighten .glow-body {
    filter: drop-shadow(0 0 14px var(--color-sunflower))
            drop-shadow(0 0 28px color-mix(in srgb, var(--color-sunflower) 60%, transparent 40%));
}

/* =========================================================
   HAND DISPLAY
   Box is SQUARE and font-size = box dimension.
   Emoji fills the full square so normalized coords (0-1) map 1:1.
   Left hand uses scaleX(-1) on the image only — nodes are NOT
   transformed and their CSS coords already account for the mirror.
   ========================================================= */

.kbm-hands-row {
    display: flex;
    gap: var(--spacing-xl);
    align-items: flex-start;
    justify-content: center;
    width: 100%;
}

.kbm-hand-box {
    position: relative;
    width:  clamp(100px, 20vw, 140px);
    height: clamp(100px, 20vw, 140px);
    flex-shrink: 0;
}

.kbm-hand-image {
    font-size:   clamp(100px, 20vw, 140px);
    line-height: 1;
    display: block;
    width: 100%;
    text-align: center;
    user-select: none;
    pointer-events: none;
}

/* Mirror the left hand so thumb is on the right (anatomically correct) */
.kbm-hand-left-img { transform: scaleX(-1); }

/* ---- Finger nodes ---- */
.kbm-finger-node {
    position: absolute;
    width:  30px;
    height: 30px;
    border-radius: var(--radius-full);
    background: transparent;
    border: 2px solid transparent;
    transform: translate(-50%, -50%);
    transition:
        background   var(--transition-fast),
        border-color var(--transition-fast),
        box-shadow   var(--transition-fast);
    pointer-events: none;
    z-index: 2;
}

.kbm-finger-node.active {
    /* White glow — high contrast against all emoji hand tones */
    background:   var(--color-white);
    border-color: var(--color-white);
    box-shadow:
        0 0 0 2px  var(--color-dark-gray),
        0 0 10px   var(--color-white),
        0 0 22px   var(--color-white),
        0 0 38px   color-mix(in srgb, var(--color-white) 70%, transparent 30%);
    animation: kbm-finger-pulse 1.2s ease-in-out infinite;
}

.kbm-finger-node.brighten {
    /* Intensified white on wrong press */
    background:   var(--color-white);
    border-color: var(--color-white);
    box-shadow:
        0 0 0 2px  var(--color-dark-gray),
        0 0 14px   var(--color-white),
        0 0 32px   var(--color-white),
        0 0 52px   color-mix(in srgb, var(--color-white) 85%, transparent 15%);
    animation: none;
}

@keyframes kbm-finger-pulse {
    0%, 100% { opacity: 1;    transform: translate(-50%,-50%) scale(1);
               box-shadow: 0 0 0 2px var(--color-dark-gray), 0 0 10px var(--color-white), 0 0 22px var(--color-white); }
    50%       { opacity: 0.9;  transform: translate(-50%,-50%) scale(1.22);
               box-shadow: 0 0 0 2px var(--color-dark-gray), 0 0 16px var(--color-white), 0 0 36px var(--color-white); }
}

/* =========================================================
   ON-SCREEN KEYBOARD
   ========================================================= */

.kbm-keyboard {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    width: 100%;
    max-width: 640px;
}

.kbm-key-row {
    display: flex;
    gap: var(--spacing-xs);
    justify-content: center;
}

.kbm-key {
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: var(--text-base);
    font-weight: 700;
    text-transform: uppercase;
    width:  clamp(30px, 6vw, 44px);
    height: clamp(30px, 6vw, 44px);
    border-radius: var(--radius-md);
    background:   color-mix(in srgb, var(--color-dark-gray) 88%, transparent 12%);
    color:        color-mix(in srgb, var(--color-medium-gray) 80%, var(--color-white) 20%);
    border: 1px solid color-mix(in srgb, var(--color-medium-gray) 35%, transparent 65%);
    cursor: pointer;
    transition:
        background var(--transition-fast),
        color      var(--transition-fast),
        box-shadow var(--transition-fast),
        transform  var(--transition-fast);
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    will-change: transform, box-shadow;
}

.kbm-key.out-of-scope { opacity: 0.25; cursor: default; pointer-events: none; }

.kbm-key.target {
    background:   color-mix(in srgb, var(--color-sunflower) 85%, var(--color-sunflower-dark) 15%);
    color:        var(--color-dark-gray);
    border-color: var(--color-sunflower-dark);
    box-shadow:
        0 0 10px var(--color-sunflower),
        0 0 22px color-mix(in srgb, var(--color-sunflower) 60%, transparent 40%),
        inset 0 1px 0 color-mix(in srgb, var(--color-white) 30%, transparent 70%);
    animation: kbm-key-glow 1.4s ease-in-out infinite;
    transform: translateY(-2px);
}

@keyframes kbm-key-glow {
    0%, 100% { box-shadow: 0 0 10px var(--color-sunflower), 0 0 22px color-mix(in srgb, var(--color-sunflower) 60%, transparent 40%); }
    50%       { box-shadow: 0 0 18px var(--color-sunflower), 0 0 36px color-mix(in srgb, var(--color-sunflower) 80%, transparent 20%); }
}

.kbm-key.correct-flash {
    background: var(--color-success); color: var(--color-white);
    border-color: var(--color-success);
    box-shadow: 0 0 16px var(--color-success);
    animation: none;
}

.kbm-key.wrong-flash {
    background:   color-mix(in srgb, var(--color-danger) 18%, var(--color-dark-gray) 82%);
    color:        color-mix(in srgb, var(--color-danger) 55%, var(--color-white) 45%);
    border-color: color-mix(in srgb, var(--color-danger) 35%, transparent 65%);
    animation: none;
}

.kbm-key.spacebar {
    width:  clamp(120px, 30vw, 200px);
    height: clamp(28px, 5vw, 38px);
    font-size: var(--text-sm);
}

/* =========================================================
   WORD / PHRASE DISPLAY
   ========================================================= */

.kbm-word-display {
    font-family: var(--font-display);
    font-size:   var(--text-3xl);
    font-weight: 700;
    text-align:  center;
    letter-spacing: 0.12em;
    min-height:  2.5rem;
    color: var(--color-dark-gray);
}

.kbm-word-display .char-pending {
    color: color-mix(in srgb, var(--color-medium-gray) 70%, var(--color-dark-gray) 30%);
    border-bottom: 3px solid color-mix(in srgb, var(--color-medium-gray) 35%, transparent 65%);
    margin: 0 1px;
    transition: color var(--transition-fast), border-color var(--transition-fast);
}

.kbm-word-display .char-target {
    color: var(--color-dark-gray);
    border-bottom: 3px solid var(--color-sunflower);
    animation: kbm-char-pulse 1.0s ease-in-out infinite;
}

.kbm-word-display .char-typed {
    color: var(--color-success);
    border-bottom: 3px solid var(--color-success);
}

.kbm-word-display .char-space {
    display: inline-block;
    width: 0.6em;
    border-bottom: 3px solid transparent;
}

.kbm-word-display .char-space.char-target {
    border-bottom-color: var(--color-sunflower);
    background: color-mix(in srgb, var(--color-sunflower) 18%, transparent 82%);
    border-radius: var(--radius-sm);
}

@keyframes kbm-char-pulse {
    0%, 100% { border-bottom-color: var(--color-sunflower); }
    50%       { border-bottom-color: var(--color-sunflower-light); }
}

.kbm-level-display {
    font-family: var(--font-body);
    font-size:   var(--text-sm);
    color:       var(--color-medium-gray);
    text-align:  center;
    min-height:  1.25rem;
}

/* =========================================================
   RESPONSIVE
   ========================================================= */

@media (max-width: 768px) {
    .kbm-app { padding: var(--spacing-md); gap: var(--spacing-sm); }
    .kbm-hands-row { gap: var(--spacing-md); }
    .kbm-hand-box  { width: clamp(80px,22vw,110px); height: clamp(80px,22vw,110px); }
    .kbm-hand-image { font-size: clamp(80px,22vw,110px); }
    .kbm-key { width: clamp(24px,8vw,34px); height: clamp(24px,8vw,34px); font-size: var(--text-sm); }
    .kbm-key.spacebar { width: clamp(90px,40vw,150px); }
    .kbm-word-display { font-size: var(--text-2xl); }
}

@media (max-width: 480px) {
    .kbm-key { width: clamp(20px,9vw,28px); height: clamp(20px,9vw,28px); font-size: var(--text-xs); }
    .kbm-key.spacebar { width: clamp(75px,42vw,120px); }
}