/* ─────────────────────────────────────────────────────────────
   Writing Monster — Design System
   Brand colors: Cyan #00F0FF | Coral #FF3860 | Violet #7B2CBF | Yellow #FFD000
   ───────────────────────────────────────────────────────────── */

:root {
    --cyan:        #00F0FF;
    --cyan-dark:   #00C8D6;
    --coral:       #FF3860;
    --coral-dark:  #D91F45;
    --violet:      #7B2CBF;
    --violet-dark: #5A1F8A;
    --yellow:      #FFD000;
    --yellow-dark: #D4AC00;

    --black:       #0A0A0A;
    --white:       #FFFFFF;
    --off-white:   #F7F7FB;
    --gray-100:    #F0F0F5;
    --gray-200:    #E2E2EA;
    --gray-400:    #AAAABC;
    --gray-600:    #666677;
    --gray-800:    #333340;

    --font-display: 'Fredoka', system-ui, sans-serif;
    --font-body:    'Nunito', system-ui, sans-serif;

    --radius-sm:  6px;
    --radius:     12px;
    --radius-lg:  20px;
    --radius-xl:  32px;

    --shadow-sm:  0 2px 8px rgba(0,0,0,0.06);
    --shadow:     0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg:  0 8px 40px rgba(0,0,0,0.12);

    --transition: 0.2s ease;
    --max-width:  1100px;
}

/* ─── Reset ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

body {
    font-family:    var(--font-body);
    color:          var(--black);
    background:     var(--white);
    margin:         0;
    padding:        0;
    line-height:    1.6;
    font-size:      16px;
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

a {
    color:           var(--violet);
    text-decoration: none;
    transition:      color var(--transition);
}
a:hover { color: var(--violet-dark); text-decoration: underline; }

h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 500;
    line-height: 1.2;
    margin:      0 0 0.5em;
    color:       var(--black);
}
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.75rem); }
h4 { font-size: 1.1rem; }

p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; padding-left: 1.5em; }

/* ─── Layout ─────────────────────────────────────────────────── */
.container {
    max-width:    var(--max-width);
    margin:       0 auto;
    padding:      0 1.5rem;
}

.page-content {
    padding: 2.5rem 0 4rem;
}

/* ─── Header ─────────────────────────────────────────────────── */
.site-header {
    background:    var(--white);
    border-bottom: 3px solid var(--violet);
    position:      sticky;
    top:           0;
    z-index:       100;
    box-shadow:    var(--shadow-sm);
}

.header-inner {
    display:         flex;
    align-items:     center;
    justify-content: space-between;
    padding-top:     0.75rem;
    padding-bottom:  0.75rem;
    gap:             1rem;
}

.logo-link { display: block; }
.logo-horiz {
    height:    48px;
    width:     auto;
}

.main-nav {
    display:     flex;
    align-items: center;
    gap:         1.25rem;
    flex-wrap:   wrap;
}

.nav-link {
    font-weight:     700;
    color:           var(--gray-800);
    text-decoration: none;
    font-size:       0.95rem;
    padding:         0.25rem 0;
    border-bottom:   2px solid transparent;
    transition:      border-color var(--transition), color var(--transition);
}
.nav-link:hover,
.nav-link.active {
    color:        var(--violet);
    border-color: var(--violet);
    text-decoration: none;
}

.nav-user {
    font-weight: 700;
    color:       var(--gray-600);
    font-size:   0.9rem;
    white-space: nowrap;
}

/* ─── Footer ─────────────────────────────────────────────────── */
.site-footer {
    background:  var(--gray-100);
    border-top:  3px solid var(--cyan);
    padding:     2rem 0;
    margin-top:  auto;
}

.footer-inner {
    display:         flex;
    align-items:     center;
    gap:             1rem;
    flex-wrap:       wrap;
}

.footer-logo { height: 36px; width: auto; }

.footer-text {
    color:       var(--gray-600);
    font-size:   0.875rem;
    margin:      0;
}

/* ─── Buttons ─────────────────────────────────────────────────── */
.btn {
    display:         inline-flex;
    align-items:     center;
    justify-content: center;
    gap:             0.5rem;
    font-family:     var(--font-body);
    font-weight:     800;
    font-size:       1rem;
    line-height:     1;
    padding:         0.75rem 1.75rem;
    border-radius:   var(--radius);
    border:          2px solid transparent;
    cursor:          pointer;
    text-decoration: none;
    transition:      background var(--transition), color var(--transition),
                     transform var(--transition), border-color var(--transition);
    white-space:     nowrap;
}
.btn:hover { transform: translateY(-1px); text-decoration: none; }
.btn:active { transform: translateY(0); }

.btn-primary {
    background:   linear-gradient(135deg, var(--coral) 0%, var(--coral-dark) 100%);
    color:        var(--white);
    border-color: var(--coral-dark);
}
.btn-primary:hover {
    background:   linear-gradient(135deg, var(--coral-dark) 0%, #b5163a 100%);
    border-color: #b5163a;
    color:        var(--white);
}

.btn-violet {
    background: var(--violet);
    color:      var(--white);
    border-color: var(--violet);
}
.btn-violet:hover { background: var(--violet-dark); border-color: var(--violet-dark); color: var(--white); }

.btn-cyan {
    background: var(--cyan);
    color:      var(--black);
    border-color: var(--cyan);
}
.btn-cyan:hover { background: var(--cyan-dark); border-color: var(--cyan-dark); }

.btn-yellow {
    background: var(--yellow);
    color:      var(--black);
    border-color: var(--yellow);
}
.btn-yellow:hover { background: var(--yellow-dark); border-color: var(--yellow-dark); }

.btn-outline {
    background:   transparent;
    color:        var(--violet);
    border-color: var(--violet);
}
.btn-outline:hover { background: var(--violet); color: var(--white); }

.btn-outline-coral {
    background:   transparent;
    color:        var(--coral);
    border-color: var(--coral);
}
.btn-outline-coral:hover { background: var(--coral); color: var(--white); }

.btn-sm {
    font-size: 0.85rem;
    padding:   0.5rem 1.1rem;
}

.btn-lg {
    font-size:    1.2rem;
    padding:      1rem 2.5rem;
    border-radius: var(--radius-lg);
}

.btn-block { width: 100%; }

.btn:disabled,
.btn[disabled] {
    opacity:    0.5;
    cursor:     not-allowed;
    transform:  none;
}

/* ─── Cards ──────────────────────────────────────────────────── */
.card {
    background:    var(--white);
    border-radius: var(--radius-lg);
    border:        2px solid var(--gray-200);
    padding:       1.75rem;
    box-shadow:    var(--shadow-sm);
    transition:    box-shadow var(--transition);
}
.card:hover { box-shadow: var(--shadow); }

.card-title {
    font-family: var(--font-display);
    font-size:   1.3rem;
    margin-bottom: 0.75rem;
}

.card-grid {
    display:               grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap:                   1.5rem;
}

/* Accent-bordered cards */
.card-cyan   { border-left: 5px solid var(--cyan); }
.card-coral  { border-left: 5px solid var(--coral); }
.card-violet { border-left: 5px solid var(--violet); }
.card-yellow { border-left: 5px solid var(--yellow); }

/* ─── Forms ──────────────────────────────────────────────────── */
.form-group { margin-bottom: 1.25rem; }

label {
    display:       block;
    font-weight:   700;
    margin-bottom: 0.4rem;
    font-size:     0.95rem;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
select,
textarea {
    width:         100%;
    padding:       0.7rem 1rem;
    border:        2px solid var(--gray-200);
    border-radius: var(--radius-sm);
    font-family:   var(--font-body);
    font-size:     1rem;
    color:         var(--black);
    background:    var(--white);
    transition:    border-color var(--transition), box-shadow var(--transition);
    outline:       none;
}
input:focus,
select:focus,
textarea:focus {
    border-color: var(--violet);
    box-shadow:   0 0 0 3px rgba(123, 44, 191, 0.12);
}

.form-hint {
    font-size:  0.825rem;
    color:      var(--gray-600);
    margin-top: 0.3rem;
}

.form-error {
    font-size:  0.875rem;
    color:      var(--coral);
    font-weight: 700;
    margin-top: 0.3rem;
}

/* ─── Alerts ─────────────────────────────────────────────────── */
.alert {
    padding:       0.9rem 1.25rem;
    border-radius: var(--radius-sm);
    border:        2px solid transparent;
    font-weight:   600;
    margin-bottom: 1.25rem;
}
.alert-error   { background: #FFF0F3; border-color: var(--coral); color: var(--coral-dark); }
.alert-success { background: #EFFFFD; border-color: var(--cyan-dark); color: #007A85; }
.alert-info    { background: #F3ECFF; border-color: var(--violet); color: var(--violet-dark); }
.alert-warning { background: #FFFBE6; border-color: var(--yellow-dark); color: #7A5A00; }

/* ─── Badges ─────────────────────────────────────────────────── */
.badge {
    display:       inline-block;
    padding:       0.2em 0.65em;
    border-radius: 999px;
    font-size:     0.75rem;
    font-weight:   800;
    line-height:   1.4;
}
.badge-cyan   { background: var(--cyan);   color: var(--black); }
.badge-coral  { background: var(--coral);  color: var(--white); }
.badge-violet { background: var(--violet); color: var(--white); }
.badge-yellow { background: var(--yellow); color: var(--black); }
.badge-gray   { background: var(--gray-200); color: var(--gray-800); }

/* ─── Tables ─────────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; }
table {
    width:           100%;
    border-collapse: collapse;
    font-size:       0.95rem;
}
thead th {
    background:  var(--gray-100);
    font-weight: 800;
    text-align:  left;
    padding:     0.75rem 1rem;
    border-bottom: 2px solid var(--gray-200);
    white-space: nowrap;
}
tbody td {
    padding:       0.65rem 1rem;
    border-bottom: 1px solid var(--gray-100);
    vertical-align: middle;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--off-white); }

/* ─── Page header ─────────────────────────────────────────────── */
.page-header {
    padding:        2rem 0 1.5rem;
    border-bottom:  2px solid var(--gray-100);
    margin-bottom:  2rem;
}
.page-header h1 { margin-bottom: 0.25rem; }
.page-header p  { color: var(--gray-600); margin: 0; font-size: 1.05rem; }

/* ─── Violet banner (interior page hero) ─────────────────────── */
.violet-banner {
    background: linear-gradient(135deg, var(--violet) 0%, #4A1080 50%, #1A0040 100%);
    padding:    2rem 0 2.5rem;
    position:   relative;
    overflow:   hidden;
    margin-bottom: 2rem;
}
.violet-banner::before {
    content:       '';
    position:      absolute;
    top: -40px; right: -60px;
    width: 280px; height: 280px;
    border-radius: 50%;
    background:    rgba(0, 240, 255, 0.12);
    pointer-events: none;
}
.violet-banner::after {
    content:       '';
    position:      absolute;
    bottom: -50px; left: -40px;
    width: 220px; height: 220px;
    border-radius: 50%;
    background:    rgba(255, 56, 96, 0.15);
    pointer-events: none;
}
.violet-banner .container { position: relative; }
.violet-banner h1,
.violet-banner h2 { color: #fff; margin-bottom: 0.25rem; }
.violet-banner p  { color: rgba(255, 255, 255, 0.85); margin: 0; font-size: 1.05rem; }

/* ─── Hero (landing page) ────────────────────────────────────── */
.hero {
    text-align:  center;
    padding:     5rem 1.5rem 4rem;
    background:  linear-gradient(135deg, var(--off-white) 0%, var(--white) 100%);
    position:    relative;
    overflow:    hidden;
}
.hero::before {
    content:  '';
    position: absolute;
    top: -60px; right: -60px;
    width: 300px; height: 300px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0,240,255,0.15) 0%, transparent 70%);
    pointer-events: none;
}
.hero::after {
    content:  '';
    position: absolute;
    bottom: -60px; left: -40px;
    width: 250px; height: 250px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255,56,96,0.1) 0%, transparent 70%);
    pointer-events: none;
}

.hero-logo { height: 80px; margin: 0 auto 2rem; }
.hero-headline { color: var(--violet); }
.hero-sub {
    font-size:   1.2rem;
    color:       var(--gray-600);
    max-width:   600px;
    margin:      0 auto 2.5rem;
    font-weight: 600;
}
.hero-actions {
    display:    flex;
    gap:        1rem;
    justify-content: center;
    flex-wrap:  wrap;
}

/* ─── Features section ───────────────────────────────────────── */
.features { padding: 4rem 0; }
.features-grid {
    display:               grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap:                   2rem;
}
.feature-card {
    text-align: center;
    padding:    2rem 1.5rem;
}
.feature-icon {
    font-size:     3rem;
    margin-bottom: 1rem;
    display:       block;
}
.feature-card h3 { font-size: 1.2rem; margin-bottom: 0.5rem; }
.feature-card p  { color: var(--gray-600); font-size: 0.95rem; margin: 0; }

/* ─── Stat cards ─────────────────────────────────────────────── */
.stat-grid {
    display:               grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap:                   1.25rem;
    margin-bottom:         2rem;
}
.stat-card {
    background:    var(--white);
    border-radius: var(--radius);
    border:        2px solid var(--gray-200);
    padding:       1.25rem;
    text-align:    center;
}
.stat-number {
    font-family:   var(--font-display);
    font-size:     2.5rem;
    line-height:   1;
    margin-bottom: 0.25rem;
}
.stat-label {
    font-size:   0.8rem;
    font-weight: 700;
    color:       var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.stat-cyan   .stat-number { color: var(--cyan-dark); }
.stat-coral  .stat-number { color: var(--coral); }
.stat-violet .stat-number { color: var(--violet); }
.stat-yellow .stat-number { color: var(--yellow-dark); }

/* ─── Lesson player ──────────────────────────────────────────── */
.lesson-player {
    max-width:  680px;
    margin:     0 auto;
    padding:    2rem 0;
}

.lesson-progress {
    display:         flex;
    gap:             0.5rem;
    justify-content: center;
    margin-bottom:   2.5rem;
}
.progress-dot {
    width:         12px;
    height:        12px;
    border-radius: 50%;
    background:    var(--gray-200);
    transition:    background var(--transition), transform var(--transition);
}
.progress-dot.done    { background: var(--cyan); }
.progress-dot.current { background: var(--coral); transform: scale(1.4); }

.sentence-card {
    background:    var(--off-white);
    border:        3px solid var(--violet);
    border-radius: var(--radius-xl);
    padding:       2rem 2rem;
    text-align:    center;
    margin-bottom: 2rem;
}
.sentence-number {
    font-family:   var(--font-display);
    font-weight:   500;
    font-size:     2.75rem;
    color:         var(--violet);
    margin-bottom: 0.5rem;
}
.violet-banner .progress-dot { background: rgba(255,255,255,0.25); }
.sentence-text {
    font-size:     2.75rem;
    font-weight:   800;
    color:         var(--black);
    margin-bottom: 0.75rem;
    min-height:    2em;
    display:       flex;
    align-items:   center;
    justify-content: center;
    line-height:   1.2;
}
.sentence-text.hidden { visibility: hidden; }

.audio-controls {
    display:    flex;
    gap:        1rem;
    justify-content: center;
    flex-wrap:  wrap;
    margin-bottom: 1rem;
}

.btn-audio {
    min-width:    200px;
    font-size:    1.2rem;
    padding:      1rem 2.5rem;
    border-radius: var(--radius-lg);
}
.btn-audio.speaking {
    background: var(--cyan);
    border-color: var(--cyan);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(0, 240, 255, 0.4); }
    50%       { box-shadow: 0 0 0 10px rgba(0, 240, 255, 0); }
}

.lesson-actions {
    display:    flex;
    gap:        1rem;
    justify-content: center;
    flex-wrap:  wrap;
}

/* ─── Print instruction ──────────────────────────────────────── */
.print-prompt {
    text-align:    center;
    padding:       3rem 1.5rem;
    max-width:     560px;
    margin:        0 auto;
}
.print-prompt .icon { font-size: 4rem; margin-bottom: 1rem; display: block; }

/* ─── Grading interface ──────────────────────────────────────── */
.grade-list { list-style: none; padding: 0; margin: 0 0 2rem; }
.grade-item {
    display:       flex;
    align-items:   flex-start;
    gap:           1rem;
    padding:       1.25rem;
    border:        2px solid var(--gray-200);
    border-radius: var(--radius);
    margin-bottom: 0.75rem;
    background:    var(--white);
}
.grade-item-num {
    font-family:   var(--font-display);
    font-size:     1.5rem;
    color:         var(--gray-400);
    min-width:     2rem;
    text-align:    center;
    flex-shrink:   0;
}
.grade-item-text {
    flex:        1;
    font-size:   1.1rem;
    font-weight: 600;
    padding-top: 0.2rem;
}
.grade-item-controls {
    display:   flex;
    gap:       0.5rem;
    flex-shrink: 0;
}

.grade-btn {
    width:         44px;
    height:        44px;
    border-radius: 50%;
    border:        2px solid;
    font-size:     1.2rem;
    cursor:        pointer;
    background:    var(--white);
    transition:    background var(--transition), color var(--transition), transform var(--transition);
    display:       flex;
    align-items:   center;
    justify-content: center;
    padding:       0;
}
.grade-btn-correct {
    border-color: var(--cyan-dark);
    color:        var(--cyan-dark);
}
.grade-btn-incorrect {
    border-color: var(--coral);
    color:        var(--coral);
}
.grade-btn-correct.selected  { background: var(--cyan);  color: var(--black); transform: scale(1.1); }
.grade-btn-incorrect.selected{ background: var(--coral); color: var(--white); transform: scale(1.1); }

.grade-item.correct   { border-color: var(--cyan);  background: #EFFFFD; }
.grade-item.incorrect { border-color: var(--coral); background: #FFF0F3; }

/* ─── Student table ──────────────────────────────────────────── */
.student-avatar {
    width:         36px;
    height:        36px;
    border-radius: 50%;
    background:    var(--violet);
    color:         var(--white);
    font-weight:   800;
    display:       inline-flex;
    align-items:   center;
    justify-content: center;
    font-size:     1rem;
}

/* ─── Utility classes ────────────────────────────────────────── */
.text-center { text-align: center; }
.text-muted  { color: var(--gray-600); }
.mt-1  { margin-top: 0.5rem; }
.mt-2  { margin-top: 1rem; }
.mt-3  { margin-top: 1.5rem; }
.mt-4  { margin-top: 2rem; }
.mb-2  { margin-bottom: 1rem; }
.mb-3  { margin-bottom: 1.5rem; }
.mb-4  { margin-bottom: 2rem; }
.gap-1 { gap: 0.5rem; }
.d-flex { display: flex; align-items: center; }
.justify-between { justify-content: space-between; }
.flex-wrap  { flex-wrap: wrap; }
.w-100 { width: 100%; }

/* ─── Responsive ─────────────────────────────────────────────── */
@media (max-width: 640px) {
    .header-inner { flex-direction: column; align-items: flex-start; gap: 0.75rem; }
    .logo-horiz   { height: 38px; }
    .main-nav     { gap: 0.75rem; }
    .hero         { padding: 3rem 1.25rem 2.5rem; }
    .card         { padding: 1.25rem; }
    .grade-item   { flex-wrap: wrap; }
}

/* ─── Print styles ───────────────────────────────────────────── */
@media print {
    .site-header,
    .site-footer,
    .no-print { display: none !important; }

    body { background: white; font-family: Arial, sans-serif; }

    @page {
        size:   landscape;
        margin: 0.45in 0.5in;
    }

    .print-only { display: block !important; }

    /* Worksheet styles */
    .worksheet { page-break-inside: avoid; }

    .worksheet-header {
        display:         flex;
        align-items:     flex-start;
        justify-content: space-between;
        margin-bottom:   0.3in;
        border-bottom:   2pt solid #000;
        padding-bottom:  0.15in;
    }

    .worksheet-meta h1 { font-size: 18pt; margin: 0 0 4pt; }
    .worksheet-meta p  { font-size: 12pt; margin: 0; }

    .ws-qr-code { width: 80px; height: 80px; }

    .ws-items { list-style: none; padding: 0; margin: 0; }

    .ws-item {
        margin-bottom:   0.2in;
        page-break-inside: avoid;
    }

    .ws-item-num {
        font-size:     14pt;
        font-weight:   bold;
        margin-bottom: 4pt;
    }

    /* Writing lines — two sets per item */
    .writing-lines {
        margin-bottom: 6pt;
    }

    .writing-line-set {
        position:    relative;
        height:      0.42in;
        margin-bottom: 4pt;
    }

    .writing-line-set::before,
    .writing-line-set::after,
    .writing-line-mid {
        content:  '';
        position: absolute;
        left:     0;
        right:    0;
        border-top: 1pt solid #000;
    }

    .writing-line-set::before { top: 0; }           /* top line */
    .writing-line-mid         { top: 50%; border-top-style: dashed; border-color: #888; } /* midline */
    .writing-line-set::after  { bottom: 0; }        /* baseline */
}

.print-only { display: none; }