/* =========================================
   1. GLOBAL & BACKGROUND — Soft Minimalism
   ========================================= */
body {
    font-family: var(--font-body);
    background-color: var(--bg-color);
    margin: 0; padding: 0; color: var(--text-primary);
    min-height: 100vh;
}

.board-container { max-width: 1200px; margin: 40px auto; padding: 0 25px; }

/* =========================================
   2. TOP BAR
   ========================================= */
.top-bar {
    display: flex; justify-content: space-between; align-items: center;
    background: var(--card-bg);
    padding: 18px 30px; border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    margin-bottom: 40px;
    border: 1px solid var(--border-color);
}

.left-section { display: flex; align-items: center; gap: 18px; }
.left-section h1 {
    margin: 0; font-size: 1.6rem; color: var(--text-primary);
    font-weight: 800; display: flex; gap: 12px; align-items: center;
    letter-spacing: -0.02em;
}

.back-link {
    text-decoration: none; color: var(--text-secondary); font-weight: 600;
    display: flex; align-items: center; gap: 8px;
    padding: 8px 12px; border-radius: var(--radius-sm); transition: var(--transition-fast);
}
.back-link:hover { background-color: var(--hover-bg); color: var(--text-primary); }

.date-badge {
    background: var(--hover-bg);
    color: var(--finance-accent);
    padding: 6px 16px; border-radius: var(--radius-pill);
    font-weight: 700; font-size: 0.9rem;
    border: 1px solid var(--border-color);
}

.right-section { display: flex; gap: 12px; }
.btn-refresh, .btn-add {
    border: none; padding: 10px 20px; border-radius: var(--radius-md);
    cursor: pointer; font-weight: 600; font-size: 0.95rem;
    transition: var(--transition-fast); display: flex; align-items: center; gap: 8px;
}

.btn-refresh {
    background: var(--hover-bg);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}
.btn-refresh:hover { background: var(--border-color); transform: translateY(-1px); }

.btn-add {
    background: var(--finance-accent);
    color: #120F0A;
    border: none;
}
.btn-add:hover { transform: translateY(-1px); filter: brightness(0.92); }

/* =========================================
   3. BẢNG NOTE (STICKY NOTES)
   ========================================= */
.notes-board {
    display: flex; flex-wrap: wrap; gap: 28px;
    align-items: flex-start; padding: 20px 0;
    justify-content: center;
}

.sticky-note {
    width: 280px; min-height: 220px;
    padding: 25px;
    color: #1a1a1a;
    border-radius: 2px 15px 15px 15px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-soft);
    position: relative;
    display: flex; flex-direction: column;
    overflow: hidden;
    transform: rotate(var(--rot, 0deg));
    opacity: 0;
    animation: slapDown 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
    transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.sticky-note:hover {
    transform: scale(1.03) rotate(0deg) !important;
    z-index: 10;
    box-shadow: var(--shadow-hover);
}

.pin {
    width: 14px; height: 14px; border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, #ff6b6b, #c0392b);
    box-shadow: 2px 3px 5px rgba(0,0,0,0.15);
    position: absolute; top: 12px; left: 50%; transform: translateX(-50%);
    z-index: 2;
}

.note-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-top: 15px; margin-bottom: 18px;
    font-size: 0.85rem; font-weight: 700;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
}
.note-header i { margin-right: 6px; color: var(--text-muted); }

.note-body {
    flex: 1; font-family: 'Kalam', cursive;
    font-size: 1.3rem; line-height: 1.5; color: var(--text-primary);
    white-space: pre-wrap; word-wrap: break-word;
}

#board-loading i { color: var(--finance-accent); margin-bottom: 15px; }
#board-loading p { color: var(--text-secondary); font-weight: 600; }

/* =========================================
   4. MODAL (CỬA SỔ NHẬP NOTE)
   ========================================= */
.modal-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(15, 17, 20, 0.45);
    display: flex; justify-content: center; align-items: center;
    z-index: 1000;
    animation: fadeIn 0.25s ease;
}

.modal-content {
    background: var(--card-bg);
    padding: 30px; border-radius: var(--radius-lg);
    width: 480px; max-width: 90%;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-modal);
    animation: slideUp 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 25px; }
.modal-header h3 { margin: 0; color: var(--text-primary); font-size: 1.4rem; display: flex; align-items: center; gap: 10px; }

.close-btn {
    background: var(--hover-bg);
    border: none;
    width: 36px; height: 36px;
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-size: 1.1rem; cursor: pointer; color: var(--text-secondary); transition: var(--transition-fast);
}
.close-btn:hover { background: color-mix(in srgb, var(--danger-color) 12%, var(--card-bg)); color: var(--danger-color); transform: rotate(90deg); }

.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-weight: 700; margin-bottom: 8px; color: var(--text-secondary); font-size: 0.95rem; }

.form-control {
    width: 100%; padding: 12px 16px;
    background: var(--hover-bg);
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    box-sizing: border-box; font-family: inherit; font-size: 1rem;
    color: var(--text-primary);
    transition: var(--transition-fast);
}
.form-control:focus { border-color: var(--finance-accent); background: var(--card-bg); box-shadow: 0 0 0 3px color-mix(in srgb, var(--finance-accent) 15%, transparent); outline: none; }
textarea.form-control { resize: vertical; min-height: 120px; }

.btn-submit {
    width: 100%;
    background: var(--finance-accent);
    color: #120F0A;
    border: none;
    padding: 14px; border-radius: var(--radius-md);
    font-weight: 700; font-size: 1.1rem; cursor: pointer; margin-top: 10px;
    display: flex; align-items: center; justify-content: center; gap: 10px;
    transition: var(--transition-fast);
}
.btn-submit:hover { filter: brightness(0.92); transform: translateY(-1px); }
.btn-submit:disabled { background: var(--text-muted); cursor: not-allowed; transform: none; }

/* =========================================
   5. ANIMATIONS & TOAST NOTIFICATION
   ========================================= */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

.toast-notification {
    position: fixed; top: 25px; right: 25px;
    padding: 16px 24px; border-radius: var(--radius-md); color: #120F0A; font-weight: 600;
    box-shadow: var(--shadow-modal);
    z-index: 10000;
    display: flex; align-items: center; gap: 12px; font-size: 1rem;
    animation: slideInRight 0.35s ease, fadeOut 0.4s 3s forwards;
}

.toast-success { background-color: var(--success-color); }
.toast-error { background-color: var(--danger-color); }

@keyframes slideInRight { from { transform: translateX(120%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes fadeOut { to { opacity: 0; visibility: hidden; } }

/* Responsive */
@media (max-width: 768px) {
    .board-container { padding: 0 15px; margin: 20px auto; }
    .top-bar { flex-direction: column; gap: 15px; padding: 15px; }
    .left-section, .right-section { width: 100%; justify-content: space-between; }
    .back-link span { display: none; }
    .notes-board { gap: 20px; }
    .sticky-note { width: 100%; }
}

@keyframes slapDown {
    0% { opacity: 0; transform: scale(1.4) translateY(-30px) rotate(calc(var(--rot, 0deg) + 8deg)); }
    50% { opacity: 1; transform: scale(0.97) rotate(calc(var(--rot, 0deg) - 2deg)); }
    100% { opacity: 1; transform: scale(1) rotate(var(--rot, 0deg)); }
}