/* ==========================================================================
   Modern SaaS Fintech Parent Fee Payment Drawer & Portal Styles
   Responsive: Mobile, Tablet, Desktop, Large Desktop (Strictly <= 350 lines)
   ========================================================================== */

.pp-drawer-overlay {
    position: fixed; inset: 0; background: rgba(15, 23, 42, 0.65);
    backdrop-filter: blur(4px); z-index: 1050; display: flex;
    justify-content: flex-end; align-items: stretch;
    transition: opacity 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}
.pp-drawer-overlay.hidden { display: none !important; }

.pp-drawer-card {
    background: var(--bg-card, #ffffff); color: var(--text-primary, #0f172a);
    width: 100%; max-width: 920px; height: 100vh; height: 100dvh;
    display: flex; flex-direction: column;
    box-shadow: -8px 0 32px rgba(0, 0, 0, 0.2); overflow: hidden;
    animation: ppSlideIn 0.28s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes ppSlideIn {
    from { transform: translateX(100%); }
    to { transform: translateX(0); }
}

@media (max-width: 768px) {
    .pp-drawer-card {
        max-width: 100%; border-radius: 16px 16px 0 0;
        margin-top: auto; height: 94vh; height: 94dvh;
        animation: ppSlideUp 0.28s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    }
    @keyframes ppSlideUp {
        from { transform: translateY(100%); }
        to { transform: translateY(0); }
    }
}

/* Header */
.pp-header {
    padding: 1.25rem 1.5rem; border-bottom: 1px solid var(--border-subtle, #e2e8f0);
    display: flex; align-items: center; justify-content: space-between;
    background: var(--bg-card, #ffffff); flex-shrink: 0;
}
.pp-title {
    font-size: 1.25rem; font-weight: 700; color: var(--text-primary, #0f172a);
    margin: 0; display: flex; align-items: center; gap: 0.5rem;
}
.pp-close-btn {
    width: 36px; height: 36px; border-radius: 50%;
    border: 1px solid var(--border-subtle, #e2e8f0);
    background: var(--bg-card-hover, #f8fafc); color: var(--text-secondary, #64748b);
    display: flex; align-items: center; justify-content: center;
    cursor: pointer; font-size: 1.2rem; transition: all 0.15s ease;
}
.pp-close-btn:hover {
    background: var(--border-subtle, #e2e8f0); color: var(--text-primary, #0f172a);
}

/* Body Scroll & Grid */
.pp-body-scroll {
    flex: 1; overflow-y: auto; padding: 1.25rem 1.5rem;
    -webkit-overflow-scrolling: touch;
}
.pp-grid-layout {
    display: grid; grid-template-columns: 1fr 340px; gap: 1.5rem; align-items: start;
}
@media (max-width: 900px) {
    .pp-grid-layout { grid-template-columns: 1fr; gap: 1.25rem; }
}

/* Student Summary Card */
.pp-student-card {
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.06) 0%, rgba(16, 185, 129, 0.05) 100%);
    border: 1px solid var(--border-subtle, #e2e8f0); border-radius: 14px;
    padding: 1rem; display: flex; align-items: center; gap: 1rem; margin-bottom: 1.25rem;
}
.pp-avatar-initials {
    width: 48px; height: 48px; border-radius: 12px;
    background: var(--accent-indigo, #4f46e5); color: #ffffff;
    font-size: 1.25rem; font-weight: 700; display: flex;
    align-items: center; justify-content: center; flex-shrink: 0;
    box-shadow: 0 4px 10px rgba(79, 70, 229, 0.25);
}
.pp-student-name {
    font-size: 1.05rem; font-weight: 700; color: var(--text-primary, #0f172a); margin-bottom: 0.2rem;
}
.pp-student-meta {
    font-size: 0.8rem; color: var(--text-muted, #64748b);
    display: flex; flex-wrap: wrap; gap: 0.4rem 0.75rem;
}

/* Amount Highlight Card */
.pp-amount-card {
    background: var(--bg-card, #ffffff); border: 1px solid var(--border-subtle, #e2e8f0);
    border-radius: 14px; padding: 1.25rem; box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}
.pp-amount-label {
    font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em;
    font-weight: 600; color: var(--text-muted, #64748b); margin-bottom: 0.25rem;
}
.pp-amount-val {
    font-size: 2rem; font-weight: 800; color: var(--accent-rose, #e11d48); letter-spacing: -0.02em;
}

/* Method Selector Cards */
.pp-method-cards-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 0.75rem; margin-bottom: 1.25rem;
}
.pp-method-card {
    border: 2px solid var(--border-subtle, #e2e8f0); border-radius: 12px;
    padding: 1rem; background: var(--bg-card, #ffffff); cursor: pointer;
    transition: all 0.2s ease; display: flex; align-items: flex-start;
    gap: 0.75rem; user-select: none; min-height: 80px;
}
.pp-method-card:hover {
    border-color: var(--accent-indigo, #4f46e5); background: var(--bg-card-hover, #f8fafc);
}
.pp-method-card.active {
    border-color: var(--accent-indigo, #4f46e5); background: rgba(79, 70, 229, 0.04);
    box-shadow: 0 0 0 1px var(--accent-indigo, #4f46e5);
}
.pp-method-icon { font-size: 1.5rem; line-height: 1; }
.pp-method-title {
    font-size: 0.95rem; font-weight: 700; color: var(--text-primary, #0f172a); margin-bottom: 0.15rem;
}
.pp-method-desc { font-size: 0.75rem; color: var(--text-muted, #64748b); line-height: 1.35; }

/* Copy Pill */
.pp-copy-btn {
    border: 1px solid var(--border-subtle, #e2e8f0); background: var(--bg-card, #ffffff);
    color: var(--text-secondary, #475569); padding: 0.2rem 0.55rem; border-radius: 6px;
    font-size: 0.75rem; cursor: pointer; font-weight: 600; transition: all 0.15s ease;
    display: inline-flex; align-items: center; gap: 0.3rem;
}
.pp-copy-btn:hover { background: var(--border-subtle, #e2e8f0); color: var(--text-primary, #0f172a); }

/* Bank Box & Steps */
.pp-bank-info-box {
    background: var(--bg-card-hover, #f8fafc); border: 1px solid var(--border-subtle, #e2e8f0);
    border-radius: 12px; padding: 1rem; margin-bottom: 1.25rem;
}
.pp-info-row {
    display: flex; align-items: center; justify-content: space-between;
    padding: 0.35rem 0; font-size: 0.85rem;
}
.pp-step-chip {
    display: inline-flex; align-items: center; justify-content: center;
    width: 22px; height: 22px; border-radius: 50%;
    background: var(--accent-indigo, #4f46e5); color: #ffffff;
    font-size: 0.75rem; font-weight: 700; margin-right: 0.4rem;
}

/* QR Card */
.pp-qr-card {
    background: #ffffff; border: 1px solid var(--border-subtle, #e2e8f0);
    border-radius: 12px; padding: 1rem; text-align: center;
}
.pp-qr-img {
    max-width: 160px; max-height: 160px; width: 160px; height: 160px;
    object-fit: contain; border-radius: 8px; margin: 0.5rem auto; background: #ffffff; display: block;
}

/* Payment Mode Radio Chips */
.pp-mode-chips { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.35rem; }
.pp-mode-chip {
    padding: 0.45rem 0.85rem; border: 1.5px solid var(--border-subtle, #e2e8f0);
    border-radius: 8px; background: var(--bg-card, #ffffff); font-size: 0.8rem;
    font-weight: 600; cursor: pointer; transition: all 0.15s ease; user-select: none;
}
.pp-mode-chip:hover { border-color: var(--accent-indigo, #4f46e5); }
.pp-mode-chip.active {
    border-color: var(--accent-indigo, #4f46e5);
    background: var(--accent-indigo, #4f46e5); color: #ffffff;
}

/* File Upload Dropzone */
.pp-dropzone {
    border: 2px dashed var(--border-color, #cbd5e1); border-radius: 12px;
    padding: 1.5rem; text-align: center; background: var(--bg-card-hover, #f8fafc);
    cursor: pointer; transition: all 0.2s ease;
}
.pp-dropzone:hover, .pp-dropzone.dragover {
    border-color: var(--accent-indigo, #4f46e5); background: rgba(79, 70, 229, 0.03);
}

/* Sticky Action Bar (Mobile & Desktop) */
.pp-footer-actions {
    padding: 1rem 1.5rem; border-top: 1px solid var(--border-subtle, #e2e8f0);
    background: var(--bg-card, #ffffff); display: flex; align-items: center;
    justify-content: space-between; gap: 1rem; flex-shrink: 0;
}
@media (max-width: 640px) {
    .pp-footer-actions {
        position: sticky; bottom: 0; box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.08);
    }
}

/* Result Screens */
.pp-result-screen { text-align: center; padding: 2.5rem 1.5rem; }
.pp-result-icon {
    width: 64px; height: 64px; border-radius: 50%;
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 2rem; margin-bottom: 1rem;
}
.pp-result-icon.success { background: rgba(16, 185, 129, 0.12); color: #10b981; }
.pp-result-icon.failed { background: rgba(225, 29, 72, 0.12); color: #e11d48; }

/* Skeleton Shimmer */
.pp-skeleton {
    background: linear-gradient(90deg, var(--border-subtle, #e2e8f0) 25%, var(--bg-card-hover, #f8fafc) 50%, var(--border-subtle, #e2e8f0) 75%);
    background-size: 200% 100%; animation: ppShimmer 1.5s infinite; border-radius: 6px;
}
@keyframes ppShimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}