/* ── Portal Variables ──────────────────────────────── */
:root {
    --cosy-green: #6b8f71;
    --cosy-green-dark: #4a6b50;
    --sidebar-width: 260px;
    --bg-muted: #f8f6f0;
}

.student-portal-pro {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* ── Gate ────────────────────────────────────────── */
#gate {
    position: fixed; inset: 0; background: var(--cream);
    display: flex; align-items: center; justify-content: center; z-index: 2000;
}
.gate-card {
    background: var(--surface-color); padding: 3rem; border-radius: 30px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.08);
    max-width: 420px; width: 90%; text-align: center;
}
.gate-icon { font-size: 3rem; margin-bottom: 1rem; }
.gate-subtitle { color: var(--ink-soft); margin-bottom: 1.5rem; }
.gate-input-section {
    background: var(--cream); padding: 1.5rem; border-radius: var(--r-lg);
    margin-bottom: 1.5rem; border: 1px solid var(--border);
}
.gate-input { width: 100%; font-size: 1.1rem; margin-bottom: 0.8rem; padding: 0.8rem; }
.gate-btn-unlock { width: 100%; justify-content: center; background: var(--ink); color: #fff; }
.gate-error { color: var(--rose); font-size: 0.8rem; margin-top: 0.5rem; display: none; }
.gate-preview-section { border-top: 1px solid var(--border); padding-top: 1.5rem; }
.gate-preview-label {
    font-size: 0.8rem; font-weight: 800; color: var(--ink-faint);
    text-transform: uppercase; margin-bottom: 0.8rem;
}
.gate-preview-controls { display: flex; gap: 8px; margin-bottom: 0.8rem; }
.gate-preview-sel { flex: 1; }
.gate-btn-free { width: 100%; justify-content: center; background: var(--sage); color: #fff; }
.gate-footer { font-size: 0.8rem; color: var(--ink-faint); margin-top: 1.5rem; }
.gate-footer a { color: var(--sage-dark); font-weight: 800; }

/* ── Main Layout ─────────────────────────────────── */
#area { display: flex; width: 100%; height: 100%; flex: 1; }

/* Sidebar */
aside.sidebar, .sidebar {
    width: var(--sidebar-width);
    background: var(--surface-color);
    border-right: 1.5px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    z-index: 100;
    flex-shrink: 0;
}
.profile-card {
    background: var(--cosy-green-dark);
    color: #fff;
    padding: 1.25rem;
    border-radius: 20px;
    margin-bottom: 2rem;
}
.stats-mini {
    display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 8px; margin-top: 1rem;
}
.stat-mini-item {
    text-align: center; background: rgba(255,255,255,0.1); padding: 5px; border-radius: 10px;
}
.stat-mini-val { font-weight: 900; font-size: 0.9rem; display: block; }
.stat-mini-lbl { font-size: 0.55rem; opacity: 0.8; text-transform: uppercase; }

.nav-menu { flex: 1; }
.nav-item {
    display: flex; align-items: center; gap: 12px;
    padding: 0.9rem 1rem; margin-bottom: 0.4rem;
    border-radius: 12px; cursor: pointer;
    font-weight: 700; color: #666; transition: all 0.2s;
}
.nav-item:hover { background: #f5f5f5; color: var(--cosy-green-dark); }
.nav-item.active { background: var(--cosy-green-dark); color: #fff; }

/* Main Content */
main.content, .main {
    flex: 1;
    overflow-y: auto;
    padding: 2rem 3rem;
    background: var(--cream);
    color: var(--ink);
}

.layout {
    display: flex;
    min-height: calc(100vh - 100px);
}

.header-row {
    display: flex; justify-content: space-between; align-items: flex-start;
    margin-bottom: 2.5rem;
}
.welcome-msg h1 { font-family: 'Lora', serif; font-size: 2.2rem; margin: 0; color: var(--cosy-green-dark); }
.welcome-msg p { margin: 5px 0 0; color: #888; }

/* Widgets */
.widgets-grid {
    display: grid; grid-template-columns: 1.5fr 1fr; gap: 1.5rem; margin-bottom: 2.5rem;
}
.widget-card {
    background: var(--surface-color); border-radius: 24px; padding: 1.5rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.03); border: 1px solid var(--border);
}
.prep-card {
    background: #4a6b50; color: #fff;
}
.prep-word {
    background: rgba(255,255,255,0.15); padding: 4px 10px; border-radius: 8px; font-size: 0.85rem; font-weight: 700;
}

/* Roadmap Path */
.roadmap-path {
    position: relative; padding: 2rem 0;
    display: flex; flex-direction: column; align-items: center;
}
.roadmap-path::before {
    content: ''; position: absolute; top: 0; bottom: 0; left: 50%;
    width: 4px; background: #eee; transform: translateX(-50%);
}
.chapter-node {
    width: 60px; height: 60px; border-radius: 50%; background: #fff;
    border: 4px solid #eee; margin: 1.5rem 0;
    display: flex; align-items: center; justify-content: center;
    font-weight: 900; z-index: 2; cursor: pointer; transition: all 0.3s;
    position: relative;
}
.chapter-node.done { border-color: var(--cosy-green); background: var(--cosy-green); color: #fff; }
.chapter-node.current {
    border-color: #e8a838; background: #e8a838; color: #fff;
    box-shadow: 0 0 0 10px rgba(232,168,56,0.15);
}
.chapter-node:hover { transform: scale(1.1); }

/* Zig-zag offset */
.chapter-node:nth-child(even) { margin-left: 100px; }
.chapter-node:nth-child(odd) { margin-right: 100px; }

/* Panels */
.panel { display: none; }
.panel.active { display: block; }

/* Utility */
.badge-new {
    background: #fff8e7; color: #a06b10; padding: 3px 10px; border-radius: 20px; font-size: 0.7rem; font-weight: 800; border: none; cursor: pointer;
}

/* ── Lesson Stripes ──────────────────────────────── */
.stripe-vocab { background: #3b82f6; }
.stripe-grammar { background: #8b5cf6; }
.stripe-gv { background: #10b981; }
.stripe-spoken { background: #f59e0b; }
.stripe-srev { background: #ec4899; }
.stripe-exam { background: #1a1714; }

.lesson-type-pill {
    font-size: 0.65rem; font-weight: 800; text-transform: uppercase;
    padding: 2px 8px; border-radius: 6px; color: #fff;
}
.t-vocab { background: #3b82f6; }
.t-grammar { background: #8b5cf6; }
.t-gv { background: #10b981; }
.t-spoken { background: #f59e0b; }
.t-srev { background: #ec4899; }
.t-exam { background: #1a1714; }

/* LD (Lesson Detail) Panel */
#ld {
    position: fixed; right: -400px; top: 0; bottom: 0; width: 380px;
    background: var(--surface-color); box-shadow: -10px 0 40px rgba(0,0,0,0.1);
    padding: 2.5rem; transition: right 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 500; overflow-y: auto;
}
#ld.open { right: 0; }
.ld-close { position: absolute; top: 1.5rem; left: 1.5rem; cursor: pointer; font-size: 1.2rem; }

#ls { display: flex; flex-direction: column; gap: 1rem; }
.notes-ta { width: 100%; height: 100px; padding: 15px; border-radius: 20px; margin-bottom: 10px; border: 1px solid #eee; font-family: inherit; }

@media (max-width: 800px) {
    aside.sidebar, .sidebar { display: none; }
    main.content, .main { padding: 1.5rem; }
}

/* ── Grammar Specific ────────────────────────────── */
.section-title { font-family: 'Lora', serif; font-size: 2rem; margin-bottom: 2rem; color: var(--ink); }
.level-badge { display: inline-block; padding: 4px 12px; background: var(--sage); color: #fff; border-radius: 20px; font-weight: 800; font-size: 0.8rem; text-transform: uppercase; margin: 2rem 0 1rem; }
.cards-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(400px, 1fr)); gap: 2rem; align-items: start; }
.card { background: var(--surface-color); border-radius: 24px; overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid var(--border); transition: transform 0.2s; }
.card:hover { transform: translateY(-4px); }
.card-title { padding: 1rem 1.5rem; background: var(--cosy-green); color: #fff; font-weight: 900; font-size: 1.2rem; letter-spacing: 0.5px; }
.card-meta { padding: 0.8rem 1.5rem; background: var(--cream); border-bottom: 1px solid var(--border); display: flex; gap: 10px; flex-wrap: wrap; }
.meta-badge { font-size: 0.7rem; font-weight: 800; text-transform: uppercase; padding: 2px 8px; border-radius: 6px; background: var(--surface-color); border: 1px solid var(--border); color: var(--ink-soft); }
.tense-grid { padding: 1.5rem; display: flex; flex-direction: column; gap: 1.5rem; }
.tense-header { font-weight: 900; font-size: 0.75rem; text-transform: uppercase; color: var(--ink-faint); margin-bottom: 0.5rem; border-bottom: 2px solid var(--cream); padding-bottom: 4px; }
.gtable { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.gtable td { padding: 6px 0; border-bottom: 1px solid #f9f9f9; }
.row-label { width: 80px; font-weight: 800; color: var(--ink-soft); font-size: 0.75rem; }
.key-verb { font-weight: 700; color: var(--cosy-green-dark); }
.key-neg { font-weight: 700; color: var(--rose); }

.sidebar-section { margin-bottom: 2rem; }
.sidebar-label { font-size: 0.7rem; font-weight: 900; color: var(--ink-faint); text-transform: uppercase; margin-bottom: 0.8rem; letter-spacing: 1px; }
.sidebar-item { display: block; padding: 6px 12px; color: var(--ink-soft); text-decoration: none; font-weight: 700; font-size: 0.85rem; border-radius: 8px; margin-bottom: 2px; }
.sidebar-item:hover { background: var(--cream); color: var(--cosy-green); }
.sidebar-item.active { background: var(--cosy-green); color: #fff; }

/* Homework Items & Status */
.hw-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    padding: 12px;
    background: #f9f9f9;
    border-radius: 10px;
    border-left: 4px solid var(--honey-dark);
}
.hw-item.hw-overdue {
    border-left-color: var(--rose);
    background: var(--rose-light);
}
.hw-unit {
    font-size: 0.75rem;
    color: var(--ink-faint);
    background: #eee;
    padding: 2px 6px;
    border-radius: 4px;
    margin-left: 8px;
}
.hw-due {
    font-size: 0.75rem;
    color: var(--ink-soft);
    margin-left: auto;
    margin-right: 15px;
}
.hw-status {
    font-size: 0.75rem;
    font-weight: 800;
    text-transform: uppercase;
    color: var(--honey-dark);
}
.hw-overdue .hw-status {
    color: var(--rose);
}