/* ═══════════════════════════════════════════════
   style.css – Avalins Matematikverkstad
   Delat design-system för alla modulsidor
═══════════════════════════════════════════════ */

/* ── Variables ───────────────────────────────── */
:root {
    /* Primärfärger */
    --color-primary:        #D97B3A;
    --color-primary-hover:  #E8955A;

    /* Bakgrund & ytor */
    --color-bg:             #FDF6EC;
    --color-surface:        #FFF8F0;
    --color-surface-alt:    #F5ECD7;

    /* Text */
    --color-text:           #4A3728;
    --color-text-secondary: #7A5C42;
    --color-heading:        #A0784A;

    /* Rätt / Fel */
    --color-correct:        #6B9E6B;
    --color-correct-bg:     #E8F5E8;
    --color-wrong:          #C0614A;
    --color-wrong-bg:       #FDF0EE;

    /* Kantlinjer & badge */
    --color-border:         #EDE0C8;
    --color-badge:          #C8A882;
    --color-badge-text:     #FFF8F0;

    /* Typsnitt */
    --font:       Arial, sans-serif;
    --fs-h1:      1.9em;
    --fs-sec:     1.05em;
    --fs-task:    1.2em;
    --fs-body:    1.05em;
    --fs-badge:   0.85em;
    --fs-nav:     0.95em;
    --fs-streak:  0.85em;

    /* Border-radius */
    --r-sm:    10px;
    --r-md:    16px;
    --r-lg:    20px;
    --r-pill:  30px;
    --r-badge: 20px;

    /* Skuggor */
    --shadow-card: 0 2px 12px rgba(74,55,40,0.09);
    --shadow-btn:  0 4px 12px rgba(217,123,58,0.3);

    /* Transitions */
    --tr-fast: 0.1s;
    --tr-base: 0.15s;
    --tr-slow: 0.2s;
}

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

/* ── Layout ──────────────────────────────────── */
body {
    font-family: var(--font);
    background-color: var(--color-bg);
    background-image:
        linear-gradient(rgba(253,246,236,0.30), rgba(253,246,236,0.30)),
        url('images/forest-bg.webp');
    background-size: cover;
    background-attachment: fixed;
    background-position: center;
    min-height: 100vh;
    padding: 16px 16px 48px;
}

/* ── Navigation ──────────────────────────────── */
.top-nav { text-align: center; margin-bottom: 10px; }
.top-nav a { color: var(--color-text-secondary); text-decoration: none; font-size: var(--fs-nav); }
.top-nav a:hover { text-decoration: underline; }

/* ── Typography ──────────────────────────────── */
h1 {
    text-align: center;
    color: var(--color-heading);
    font-size: var(--fs-h1);
    margin-bottom: 6px;
}

.section-title {
    text-align: center;
    font-size: var(--fs-sec);
    font-weight: bold;
    color: var(--color-primary);
    margin: 22px 0 10px;
}

/* ── Cards ───────────────────────────────────── */
.card {
    background: rgba(255,248,240,0.88);
    border-radius: var(--r-lg);
    padding: 22px 20px 20px;
    max-width: 500px;
    margin: 0 auto 12px;
    box-shadow: var(--shadow-card);
}

.task-label {
    text-align: center;
    font-size: var(--fs-task);
    color: var(--color-text);
    margin-bottom: 16px;
    line-height: 1.5;
}

/* ── Buttons ─────────────────────────────────── */
.btn-row {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 12px;
}

button {
    font-family: var(--font);
    font-size: var(--fs-body);
    padding: 11px 24px;
    border: none;
    border-radius: var(--r-pill);
    cursor: pointer;
    transition: transform var(--tr-fast);
}
button:active   { transform: scale(0.95); }
button:disabled { opacity: 0.45; cursor: not-allowed; }

.btn-primary { background: var(--color-primary); color: #fff; box-shadow: var(--shadow-btn); }
.btn-primary:hover { background: var(--color-primary-hover); }

.btn-secondary { background: var(--color-surface); color: var(--color-primary); border: 2px solid var(--color-primary); }
.btn-secondary:hover { background: var(--color-surface-alt); }

@keyframes btn-pulse {
    0%   { box-shadow: 0 0 0 0   rgba(217,123,58,0.5); }
    60%  { box-shadow: 0 0 0 8px rgba(217,123,58,0);   }
    100% { box-shadow: 0 0 0 0   rgba(217,123,58,0);   }
}
.btn-pulse { animation: btn-pulse 1.1s ease-out infinite; }

/* ── Feedback & Streak ───────────────────────── */
.streak {
    text-align: center;
    font-size: var(--fs-streak);
    color: var(--color-text-secondary);
    min-height: 18px;
    margin-top: 8px;
}

.feedback {
    text-align: center;
    font-size: var(--fs-body);
    color: var(--color-text);
    min-height: 28px;
    margin-top: 4px;
    line-height: 1.5;
}

/* ── Level badge ─────────────────────────────── */
.level-badge {
    display: inline-block;
    background: var(--color-badge);
    color: var(--color-primary);
    border: 1.5px solid var(--color-border);
    border-radius: var(--r-badge);
    padding: 3px 14px;
    font-size: var(--fs-badge);
    font-weight: bold;
}

/* ── Choice layouts ──────────────────────────── */
.choice-row {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
    margin: 4px 0 10px;
}

.choice-col {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin: 4px 0 12px;
}

/* ── Choice buttons ──────────────────────────── */
.choice-btn {
    font-family: var(--font);
    font-size: 1.3em;
    font-weight: bold;
    padding: 12px 20px;
    border: 2.5px solid var(--color-primary);
    border-radius: var(--r-md);
    background: var(--color-surface);
    color: var(--color-text);
    cursor: pointer;
    transition: background var(--tr-base), border-color var(--tr-base), transform var(--tr-fast);
    min-width: 80px;
    text-align: center;
}
.choice-btn:hover:not(:disabled)  { background: var(--color-surface-alt); border-color: var(--color-primary-hover); }
.choice-btn:active:not(:disabled) { transform: scale(0.95); }
.choice-btn:disabled { cursor: not-allowed; }
.choice-btn.ok  { background: var(--color-correct-bg);  border-color: var(--color-correct);  color: var(--color-correct);  opacity: 1; }
.choice-btn.err { background: var(--color-wrong-bg); border-color: var(--color-wrong); color: var(--color-wrong); opacity: 0.45; }

.choice-btn-text {
    font-family: var(--font);
    font-size: 1em;
    padding: 12px 16px;
    border: 2.5px solid var(--color-primary);
    border-radius: 14px;
    background: var(--color-surface);
    color: var(--color-text);
    cursor: pointer;
    text-align: left;
    white-space: normal;
    word-break: break-word;
    line-height: 1.4;
    transition: background var(--tr-base), border-color var(--tr-base), transform var(--tr-fast);
}
.choice-btn-text:hover:not(:disabled)  { background: var(--color-surface-alt); border-color: var(--color-primary-hover); }
.choice-btn-text:active:not(:disabled) { transform: scale(0.98); }
.choice-btn-text:disabled { cursor: not-allowed; }
.choice-btn-text.ok  { background: var(--color-correct-bg);  border-color: var(--color-correct);  color: var(--color-correct);  opacity: 1; }
.choice-btn-text.err { background: var(--color-wrong-bg); border-color: var(--color-wrong); color: var(--color-wrong); opacity: 0.45; }

/* ── Answer inputs ───────────────────────────── */
.answer-input {
    width: 58px;
    font-size: 1.2em;
    padding: 7px 8px;
    border: 2.5px solid var(--color-border);
    border-radius: var(--r-sm);
    text-align: center;
    outline: none;
    font-family: var(--font);
    transition: border-color var(--tr-slow), background var(--tr-slow);
}
.answer-input:focus { border-color: var(--color-primary); }
.answer-input.ok    { border-color: var(--color-correct);  background: var(--color-correct-bg); }
.answer-input.err   { border-color: var(--color-wrong); background: var(--color-wrong-bg); }
.answer-input.w3    { width: 70px; }

/* ── Fraction display ────────────────────────── */
.fs {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    line-height: 1.15;
}
.fs .fn { border-bottom: 2.5px solid var(--color-text); padding: 0 5px 2px; }
.fs .fd { padding: 2px 5px 0; }

/* fraction inside a choice-btn (brak) */
.choice-btn .fs { font-size: 0.95em; line-height: 1.2; }
.choice-btn .fs .fn { border-bottom-color: currentColor; }

/* ── Stats bar (persistent score / daily streak) ── */
/* Dold på begäran — poäng/stjärnor sparas fortfarande i localStorage
   via recordCorrect(); endast den visuella baren är borttagen. */
#av-stats-bar { display: none; }