/* ================================================================
   business-days.css
   Extends global.css — uses its variables: --bg, --text-primary,
   --text-secondary, --accent, --glass, --border, --shadow
   ================================================================ */

/* Animations */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes popIn {
    0% { opacity: 0; transform: scale(0.95); }
    100% { opacity: 1; transform: scale(1); }
}

@keyframes pulseGlow {
    0% { box-shadow: 0 0 0 0 rgba(237, 20, 91, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(237, 20, 91, 0); }
    100% { box-shadow: 0 0 0 0 rgba(237, 20, 91, 0); }
}

/* ── Ad units ── */
.ad-leaderboard {
    background: var(--glass);
    border-bottom: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100px;
    position: relative;
    padding: 8px;
    margin-bottom: 2rem;
}

.ad-inline, .ad-sidebar {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 8px;
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.ad-inline { min-height: 100px; margin: 2rem 0; }
.ad-sidebar { min-height: 270px; }

.ad-inline:hover, .ad-sidebar:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.ad-label {
    position: absolute;
    top: 5px;
    left: 10px;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-secondary);
    opacity: 0.5;
}

/* Dev-only placeholder */
.ad-mock {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 728px;
    height: 90px;
    background: rgba(0,0,0,0.03);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    opacity: 0.6;
    border: 1px dashed var(--border);
}
.dark-theme .ad-mock { background: rgba(255,255,255,0.03); }

.ad-mock.sidebar-mock {
    max-width: 300px;
    height: 250px;
    width: 100%;
}

/* ── Page layout ── */
.page-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2.5rem;
    align-items: start;
    animation: fadeUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.calc-column { min-width: 0; }

.sidebar-column {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    position: sticky;
    top: 24px;
}

/* ── Hero ── */
.hero-section { margin-bottom: 3rem; }

.hero-section h1 {
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 0.8rem;
    line-height: 1.15;
    background: linear-gradient(135deg, var(--text-primary) 30%, var(--text-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-section .subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    line-height: 1.6;
    font-weight: 400;
}

/* ── Calculator card ── */
.calc-card {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    margin-bottom: 2rem;
    position: relative;
    /* subtle inner glow */
    box-shadow: var(--shadow-lg), inset 0 0 0 1px rgba(255,255,255,0.1);
    transform: translateZ(0); /* Hardware acceleration */
}

/* ── Mode tabs ── */
.mode-tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
    background: rgba(0,0,0,0.02);
    position: relative;
}
.dark-theme .mode-tabs { background: rgba(255,255,255,0.02); }

.mode-tab {
    flex: 1;
    padding: 1.2rem 0.5rem;
    font-family: 'Outfit', sans-serif;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-bottom: 3px solid transparent;
    margin-bottom: -1px;
    position: relative;
    overflow: hidden;
}

.mode-tab::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: var(--accent-gradient);
    border-radius: 3px 3px 0 0;
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.mode-tab.active {
    color: var(--text-primary);
    background: var(--glass);
}

.mode-tab.active::after {
    width: 100%;
}

.mode-tab:hover:not(.active) {
    color: var(--text-primary);
    background: rgba(0,0,0,0.03);
}
.dark-theme .mode-tab:hover:not(.active) { background: rgba(255,255,255,0.04); }

/* ── Card body ── */
.card-body { padding: 2.5rem; }

/* ── Shared controls ── */
.shared-controls {
    display: flex;
    align-items: flex-end;
    gap: 1.5rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    background: var(--bg);
    padding: 1.2rem;
    border-radius: 16px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.shared-controls .input-group { flex: 1; min-width: 180px; }

/* ── Tab panels ── */
.tab-panel { display: none; animation: popIn 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards; }
.tab-panel.active { display: block; }

/* ── Input rows ── */
.input-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.input-row.single { grid-template-columns: 1fr; }

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.input-group label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-secondary);
    font-weight: 700;
    margin-left: 0.2rem;
}

.input-group input,
.input-group select {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text-primary);
    font-family: 'Outfit', sans-serif;
    font-size: 1.05rem;
    padding: 0.9rem 1.2rem;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    outline: none;
    width: 100%;
    -webkit-appearance: none;
    appearance: none;
    box-shadow: 0 2px 4px rgba(0,0,0,0.02) inset;
}

/* Add custom arrow for select */
.input-group select {
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23334155' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1em;
    padding-right: 2.5rem;
}
.dark-theme .input-group select {
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
}

.input-group input:hover,
.input-group select:hover {
    border-color: #cbd5e1;
}
.dark-theme .input-group input:hover,
.dark-theme .input-group select:hover {
    border-color: #475569;
}

.input-group input:focus,
.input-group select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(237, 20, 91, 0.15), inset 0 2px 4px rgba(0,0,0,0.02);
    transform: translateY(-1px);
}

/* ── Holiday toggle ── */
.toggle-row {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding-bottom: 0.25rem;
    flex-shrink: 0;
    margin-top: 0.5rem;
}

.toggle-switch {
    position: relative;
    width: 48px;
    height: 26px;
    flex-shrink: 0;
}

.toggle-switch input { opacity: 0; width: 0; height: 0; }

.toggle-slider {
    position: absolute;
    inset: 0;
    background: var(--border);
    border-radius: 26px;
    cursor: pointer;
    transition: background 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.05);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    width: 20px; height: 20px;
    left: 3px; top: 3px;
    background: #ffffff;
    border-radius: 50%;
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.3s;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}
.dark-theme .toggle-slider::before { background: var(--text-primary); }

.toggle-switch input:checked + .toggle-slider { 
    background: var(--accent-gradient); 
}
.toggle-switch input:checked + .toggle-slider::before {
    transform: translateX(22px);
    background: #ffffff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.3);
}

.toggle-switch input:focus-visible + .toggle-slider {
    box-shadow: 0 0 0 3px rgba(237, 20, 91, 0.3);
}

.toggle-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: color 0.2s;
}
.toggle-label:hover { color: var(--text-primary); }

/* ── Result display ── */
.result-display {
    text-align: center;
    padding: 3.5rem 2rem 2.5rem;
    border-top: 1px solid var(--border);
    background: var(--bg);
    position: relative;
    overflow: hidden;
}

.result-display::before {
    content: '';
    position: absolute;
    top: 0; left: 50%;
    transform: translateX(-50%);
    width: 150px;
    height: 1px;
    background: var(--accent-gradient);
    opacity: 0.5;
}

.result-number {
    font-size: clamp(5rem, 15vw, 9rem);
    font-weight: 900;
    line-height: 1;
    letter-spacing: -0.04em;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-variant-numeric: tabular-nums;
    text-shadow: var(--glow);
    display: inline-block;
    animation: popIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.result-label {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-top: 0.5rem;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.5;
}

/* Result date (Add mode) */
.result-date-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    max-width: 480px;
    margin: 1.5rem auto 0;
    padding: 1rem 1.8rem;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    flex-wrap: wrap;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s;
}
.result-date-wrap:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.result-date-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-secondary);
    font-weight: 700;
}

.result-date-value {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--accent);
}

/* 4-metric breakdown grid */
.breakdown-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    max-width: 550px;
    margin: 2rem auto 0;
}

.breakdown-item {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1rem 0.5rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.breakdown-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
    border-color: rgba(237, 20, 91, 0.2);
}

.bk-value {
    display: block;
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
    line-height: 1.2;
}

.bk-label {
    display: block;
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    margin-top: 0.4rem;
    font-weight: 600;
}

/* Share row */
.share-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-top: 2.5rem;
}

.btn-share {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    background: var(--bg);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-family: 'Outfit', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: var(--shadow-sm);
}

.btn-share:hover {
    background: var(--accent-gradient);
    color: white;
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 8px 15px rgba(237, 20, 91, 0.25);
}

.btn-share:active {
    transform: scale(0.96);
}

.btn-share svg { 
    width: 18px; height: 18px; 
    transition: transform 0.3s;
}

.btn-share:hover svg {
    transform: scale(1.1);
}

.share-feedback {
    font-size: 0.85rem;
    color: var(--accent);
    font-weight: 700;
    opacity: 0;
    transform: translateX(-10px);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.share-feedback.visible {
    opacity: 1;
    transform: translateX(0);
}

/* ── Holiday section ── */
.holiday-section { margin-bottom: 2.5rem; }

.section-title {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
    margin-bottom: 1.2rem;
    display: inline-block;
}

.holiday-list {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.holiday-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 0.9rem 1.2rem;
    border-radius: 12px;
    background: var(--bg);
    border: 1px solid var(--border);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 2px 4px rgba(0,0,0,0.01);
}

.holiday-item:hover { 
    transform: translateX(6px); 
    border-color: var(--accent);
    background: var(--glass);
    box-shadow: var(--shadow-sm);
}

.holiday-date {
    font-size: 0.85rem;
    font-weight: 800;
    color: var(--accent);
    min-width: 130px;
    font-variant-numeric: tabular-nums;
}

.holiday-name {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

.no-holidays-msg {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-style: italic;
    background: var(--bg);
    padding: 1rem;
    border-radius: 12px;
    border: 1px dashed var(--border);
    text-align: center;
}

/* ── Visual Calendar ── */
.visual-calendar {
    display: block;
    margin-bottom: 2.5rem;
}

.mini-cal {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 1.3rem 1.1rem;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s, box-shadow 0.3s;
}

.mini-cal:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

.mini-cal-header {
    font-size: 0.9rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 1rem;
}

.mini-cal-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
    text-align: center;
    font-size: 0.75rem;
    font-variant-numeric: tabular-nums;
}

.mini-cal-dow {
    font-weight: 800;
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    padding: 0.3rem 0;
    margin-bottom: 0.5rem;
}

.mini-cal-day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.8rem;
    transition: all 0.2s;
    cursor: default;
}

.mini-cal-day:hover:not(.empty) {
    transform: scale(1.15);
    z-index: 2;
    background: var(--border);
}

.mini-cal-day.empty    { visibility: hidden; }
.mini-cal-day.outside  { opacity: 0.25; }
.mini-cal-day.weekend  { background: var(--bg); color: var(--text-secondary); opacity: 0.6; }
.mini-cal-day.holiday  { background: rgba(237,20,91,0.1); color: var(--accent); font-weight: 800; }
.mini-cal-day.today    { 
    box-shadow: inset 0 0 0 2px var(--accent); 
    background: var(--bg);
    color: var(--accent);
}

/* ── Calendar Navigation ── */
.cal-nav-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    width: 100%;
}

.cal-nav-btn {
    cursor: pointer;
    background: var(--bg-card, var(--bg));
    color: var(--text-main, var(--text-primary));
    border: 1px solid var(--border-color, var(--border));
    padding: 6px 14px;
    border-radius: 6px;
    font-weight: bold;
    font-family: inherit;
    transition: background 0.2s;
}

.cal-nav-btn:hover {
    background: var(--bg-hover, rgba(255,255,255,0.05));
}

.cal-nav-title {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-main, var(--text-primary));
}

.cal-months-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    justify-content: center;
    align-items: flex-start;
}

/* ── Calendar Legend ── */
.mini-cal-legend {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.legend-item {
    display: flex;
    align-items: center;
}

.legend-dot {
    display: inline-block;
    width: 12px; height: 12px;
    border-radius: 50%;
    margin-right: 6px;
}

.legend-dot.legend-business { background: transparent; border: 1px solid var(--text-primary); }
.legend-dot.legend-weekend  { background: var(--bg); border: 1px dashed var(--border); }
.legend-dot.legend-holiday  { background: rgba(237,20,91,0.2); border: 1px solid rgba(237,20,91,0.5); }

/* ── Sidebar cards ── */
.sidebar-card {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 1.8rem;
    box-shadow: var(--shadow-sm);
    backdrop-filter: blur(12px);
    transition: transform 0.3s, box-shadow 0.3s;
}

.sidebar-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.use-case-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.use-case-list li {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.use-case-list li strong { 
    color: var(--text-primary); 
    display: block;
    margin-bottom: 0.2rem;
}

.use-icon {
    font-size: 1.3rem;
    flex-shrink: 0;
    background: var(--bg);
    width: 32px; height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    border: 1px solid var(--border);
}

/* ── Reference Table ── */
.ref-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.ref-table th {
    text-align: left;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-secondary);
    padding: 0 0 0.8rem;
    border-bottom: 2px solid var(--border);
}

.ref-table td {
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
}

.ref-table td:first-child { color: var(--text-primary); font-weight: 700; }
.ref-table tr:last-child td { border-bottom: none; }
.ref-table tr:hover td { color: var(--accent); }

/* ── SEO content ── */
.seo-content {
    padding-top: 3rem;
    border-top: 1px solid var(--border);
    margin-top: 3rem;
}

.seo-content h2 {
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin: 0 0 1rem;
    color: var(--text-primary);
}

.seo-content h3 {
    font-size: 1.2rem;
    font-weight: 800;
    margin: 2rem 0 0.8rem;
    color: var(--text-primary);
}

.seo-content p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1.2rem;
}

.seo-content ul {
    list-style: none;
    padding: 0;
}

.seo-content ul li {
    position: relative;
    padding-left: 1.8rem;
    margin-bottom: 0.8rem;
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.6;
}

.seo-content ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.65rem;
    width: 6px; height: 6px;
    background: var(--accent-gradient);
    border-radius: 50%;
}

.faq-title {
    margin-top: 3.5rem !important;
}

.faq-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.faq-item {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.8rem;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s;
}
.faq-item:hover { transform: translateY(-3px); box-shadow: var(--shadow); }

.faq-q {
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--text-primary);
    margin: 0 0 0.8rem;
    line-height: 1.4;
}

.faq-a {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0;
    max-width: none;
}

/* ── Responsive ── */
@media (max-width: 1024px) {
    .page-layout {
        grid-template-columns: 1fr;
    }
    .sidebar-column {
        position: static;
        display: grid;
        grid-template-columns: 1fr 1fr;
        order: 1; /* Move below calculator */
    }
    .ad-sidebar { display: none; }
}

@media (max-width: 768px) {
    .sidebar-column { grid-template-columns: 1fr; }
    .card-body { padding: 1.8rem; }
    .shared-controls { gap: 1rem; padding: 1rem; }
    .mode-tab { font-size: 0.85rem; padding: 1rem 0.3rem; }
    .input-row { grid-template-columns: 1fr; gap: 1rem; }
    .result-display { padding: 2.5rem 1rem 1.8rem; }
    .breakdown-grid { grid-template-columns: repeat(2, 1fr); gap: 0.8rem; }
    .faq-grid { grid-template-columns: 1fr; }
    .hero-section h1 { font-size: 2.2rem; }
    .calc-card { border-radius: 20px; }
}

@media (max-width: 480px) {
    .hero-section h1 { font-size: 1.8rem; }
    .hero-section p { font-size: 1rem; }
    .card-body { padding: 1.2rem; }
    .result-display { padding: 1.5rem 1rem 1.2rem; }
    .result-value, .result-date-value { font-size: 2.2rem; }
    .breakdown-grid { grid-template-columns: 1fr; gap: 0.8rem; }
    .shared-controls { flex-direction: column; align-items: stretch; }
    .mode-tab { padding: 0.8rem 0.2rem; font-size: 0.8rem; }
}