/* ═══════════════════════════════════════════
   ppf.css — PPF Calculator specific styles
   Requires: calc-global.css
   ─────────────────────────────────────────
   SECTIONS:
   [CSS0]  CSS variables — PPF colour palette
   [CSS1]  Colour utilities
   [CSS2]  Frequency chip grid
   [CSS3]  Extension pill toggle
   [CSS4]  EEE tax note
   [CSS5]  Lock-in status box
   [CSS6]  Hero maturity banner
   [CSS7]  Empty field prompt
   [CSS8]  4 unique stat cards
   [CSS9]  Donut tooltip
   [CSS10] Line chart legend
   [CSS11] Lock-in timeline
   [CSS12] Layout-shift prevention
   [CSS13] Responsive
═══════════════════════════════════════════ */


/* ═══════════════════════════════════════════
   [CSS0]  PPF CSS VARIABLES
═══════════════════════════════════════════ */

:root {
    --ppf-green:       #047857;
    --ppf-green-soft:  #D1FAE5;
    --ppf-gold:        #B45309;
    --ppf-gold-soft:   #FEF3C7;
    --ppf-teal:        #0D9488;
    --ppf-teal-soft:   #CCFBF1;
    --ppf-lock:        #7C3AED;
    --ppf-lock-soft:   #EDE9FE;
}


/* ═══════════════════════════════════════════
   [CSS1]  COLOUR UTILITIES
═══════════════════════════════════════════ */

.c-ppf-green { color: var(--ppf-green); }
.c-ppf-gold  { color: var(--ppf-gold); }
.c-ppf-lock  { color: var(--ppf-lock); }

/* Locked rate display — matches ig-row style */
.ig-locked-display {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--slate-light);
    border: 1.5px solid var(--slate-line);
    border-radius: var(--r-md);
    padding: .55rem .85rem;
    margin-top: .35rem;
    cursor: not-allowed;
}

.ig-locked-value {
    font-size: 1.1rem;
    font-weight: 800;
    font-family: var(--font-mono);
    color: var(--navy);
    letter-spacing: -.02em;
}

.ig-locked-badge {
    display: flex;
    align-items: center;
    gap: 5px;
    background: var(--ppf-green-soft);
    border: 1px solid #6EE7B7;
    border-radius: 20px;
    padding: .2rem .65rem;
    font-size: .68rem;
    font-weight: 700;
    color: var(--ppf-green);
}

.ig-locked-badge i {
    font-size: .62rem;
}


/* ═══════════════════════════════════════════
   [CSS2]  FREQUENCY CHIP GRID
═══════════════════════════════════════════ */

.freq-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: .9rem;
}

.freq-chip {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: .26rem .75rem;
    border-radius: 30px;
    border: 1.5px solid var(--slate-line);
    background: var(--white);
    font-size: .73rem;
    font-weight: 600;
    color: var(--slate);
    cursor: pointer;
    transition: all .18s var(--ease);
    user-select: none;
}
.freq-chip:hover {
    border-color: var(--ppf-green);
    color: var(--ppf-green);
}
.freq-chip.active {
    background: var(--ppf-green-soft);
    border-color: var(--ppf-green);
    color: var(--ppf-green);
}
.freq-chip .chip-hint {
    font-size: .64rem;
    color: var(--ppf-gold);
    font-weight: 700;
}


/* ═══════════════════════════════════════════
   [CSS3]  EXTENSION PILL TOGGLE
═══════════════════════════════════════════ */

.ext-hd {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0;
    flex-wrap: wrap;
    gap: 8px;
}

.ext-pill {
    display: flex;
    gap: 4px;
    background: var(--slate-light);
    border-radius: 20px;
    padding: 3px;
}

.ep-opt {
    padding: .18rem .6rem;
    border-radius: 16px;
    border: none;
    background: transparent;
    font-size: .7rem;
    font-weight: 600;
    color: var(--slate);
    cursor: pointer;
    transition: all .15s;
}
.ep-opt.active {
    background: var(--white);
    color: var(--navy);
    box-shadow: 0 1px 4px rgba(13,37,69,.12);
}
.ep-opt:hover:not(.active) { color: var(--navy); }


/* ═══════════════════════════════════════════
   [CSS4]  EEE TAX NOTE
═══════════════════════════════════════════ */

.eee-note {
    margin-top: 6px;
    background: var(--ppf-green-soft);
    border: 1px solid #6EE7B7;
    border-radius: 8px;
    padding: .35rem .7rem;
    font-size: .69rem;
    color: #065f46;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 5px;
}
.eee-note i { color: var(--ppf-green); font-size: .78rem; }


/* ═══════════════════════════════════════════
   [CSS5]  LOCK-IN STATUS BOX
═══════════════════════════════════════════ */

.lockin-box {
    background: var(--ppf-lock-soft);
    border: 1.5px solid #C4B5FD;
    border-radius: var(--r-md);
    padding: .75rem 1rem;
    margin-bottom: 1.2rem;
    display: flex;
    font-size: .77rem;
    color: #4C1D95;
    font-weight: 500;
    align-items: flex-start;
    gap: .5rem;
}
.lockin-box i { color: var(--ppf-lock); font-size: .9rem; flex-shrink: 0; margin-top: 1px; }

.withdrawal-box {
    background: var(--ppf-teal-soft);
    border: 1.5px solid #5EEAD4;
    border-radius: var(--r-md);
    padding: .75rem 1rem;
    margin-bottom: 1.2rem;
    display: none;
    font-size: .77rem;
    color: #134E4A;
    font-weight: 500;
    align-items: flex-start;
    gap: .5rem;
}
.withdrawal-box.show { display: flex; }
.withdrawal-box i { color: var(--ppf-teal); font-size: .9rem; flex-shrink: 0; margin-top: 1px; }


/* ═══════════════════════════════════════════
   [CSS6]  HERO MATURITY BANNER
═══════════════════════════════════════════ */

.hero-tax-banner {
    margin-top: 10px;
    background: rgba(255, 255, 255, .13);
    border: 1px solid rgba(255, 255, 255, .28);
    border-radius: 12px;
    padding: .55rem .85rem;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: .78rem;
    font-weight: 600;
    color: #fff;
    flex-wrap: wrap;
}
.hero-tax-banner i { color: #6EE7B7; }
.tax-badge {
    background: rgba(255, 255, 255, .18);
    border: 1px solid rgba(255, 255, 255, .35);
    border-radius: 20px;
    padding: .12rem .5rem;
    font-size: .7rem;
    font-weight: 700;
    color: #fff;
}

/* ═══════════════════════════════════════════
   [CSS7]  EMPTY FIELD PROMPT
═══════════════════════════════════════════ */

.field-empty-prompt {
    font-size: .7rem;
    color: var(--danger);
    margin-top: 5px;
    display: none;
    align-items: center;
    gap: 4px;
    background: var(--danger-soft);
    border: 1px solid #FECACA;
    border-radius: 8px;
    padding: .3rem .6rem;
}
.field-empty-prompt.show { display: flex; }


/* ═══════════════════════════════════════════
   [CSS8]  4 UNIQUE STAT CARDS
═══════════════════════════════════════════ */

.ppf-stat-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 1.2rem;
}

.ppf-stat-card {
    border-radius: 14px;
    padding: .9rem 1rem;
    display: flex;
    align-items: flex-start;
    gap: .7rem;
    border: 1.5px solid transparent;
    transition: transform .15s var(--ease), box-shadow .15s;
    position: relative;
    overflow: hidden;
}
.ppf-stat-card::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: .04;
    border-radius: inherit;
    pointer-events: none;
}
.ppf-stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(13,37,69,.09);
}

/* Card 1: Total Invested — teal */
.ppf-stat-card.card-invested {
    background: var(--ppf-teal-soft);
    border-color: #5EEAD4;
}
.ppf-stat-card.card-invested::before { background: var(--ppf-teal); }
.ppf-stat-card.card-invested .psc-icon  { color: var(--ppf-teal); background: #CCFBF1; }
.ppf-stat-card.card-invested .psc-value { color: var(--ppf-teal); }

/* Card 2: Interest Earned — gold */
.ppf-stat-card.card-interest {
    background: var(--ppf-gold-soft);
    border-color: #FDE68A;
}
.ppf-stat-card.card-interest::before { background: var(--ppf-gold); }
.ppf-stat-card.card-interest .psc-icon  { color: var(--ppf-gold); background: #FEF3C7; }
.ppf-stat-card.card-interest .psc-value { color: var(--ppf-gold); }

/* Card 3: Tax Saved — green */
.ppf-stat-card.card-tax {
    background: var(--ppf-green-soft);
    border-color: #6EE7B7;
}
.ppf-stat-card.card-tax::before { background: var(--ppf-green); }
.ppf-stat-card.card-tax .psc-icon  { color: var(--ppf-green); background: #D1FAE5; }
.ppf-stat-card.card-tax .psc-value { color: var(--ppf-green); }

/* Card 4: Lock-in — purple */
.ppf-stat-card.card-lockin {
    background: var(--ppf-lock-soft);
    border-color: #C4B5FD;
}
.ppf-stat-card.card-lockin::before { background: var(--ppf-lock); }
.ppf-stat-card.card-lockin .psc-icon  { color: var(--ppf-lock); background: #EDE9FE; }
.ppf-stat-card.card-lockin .psc-value { color: var(--ppf-lock); }

.psc-icon {
    width: 34px;
    height: 34px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .95rem;
    flex-shrink: 0;
}

.psc-body { flex: 1; min-width: 0; }

.psc-label {
    font-size: .65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--slate);
    margin-bottom: 3px;
}

.psc-value {
    font-size: 1.05rem;
    font-weight: 800;
    font-family: var(--font-mono);
    color: var(--navy);
    line-height: 1.2;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.psc-sub {
    font-size: .67rem;
    color: var(--slate);
    margin-top: 2px;
    line-height: 1.4;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}


/* ═══════════════════════════════════════════
   [CSS9]  DONUT TOOLTIP
═══════════════════════════════════════════ */

#ppfDonutTip {
    position: absolute;
    bottom: 105%;
    left: 50%;
    transform: translateX(-50%);
    background: #0D2545;
    border-radius: 16px;
    overflow: hidden;
    pointer-events: none;
    opacity: 0;
    transition: opacity .18s;
    z-index: 20;
    width: 192px;
    box-shadow: 0 20px 40px rgba(13,37,69,.35), 0 4px 12px rgba(13,37,69,.2);
}

.donut-arc {
    transition: opacity .18s, stroke-width .15s;
    fill: none;
    stroke-width: 16px;
}

.dl-item.dl-active .dl-txt,
.dl-item.dl-active .dl-val { color: var(--navy); font-weight: 700; }
.dl-item.dl-dim { opacity: .4; }


/* ═══════════════════════════════════════════
   [CSS10] LINE CHART LEGEND
═══════════════════════════════════════════ */

.chart-legend {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 10px;
    padding-top: 8px;
    border-top: 1px solid var(--slate-line);
}

.cl-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: .72rem;
    color: var(--slate);
    font-weight: 500;
}

.cl-dot {
    width: 10px;
    height: 10px;
    border-radius: 3px;
    flex-shrink: 0;
}


/* ═══════════════════════════════════════════
   [CSS11] LOCK-IN TIMELINE
═══════════════════════════════════════════ */

.lockin-timeline {
    margin: 1rem 0 1.2rem;
    background: var(--slate-light);
    border-radius: 12px;
    padding: .85rem 1rem;
    border: 1px solid var(--slate-line);
}

.lt-title {
    font-size: .7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .07em;
    color: var(--slate);
    margin-bottom: .7rem;
    display: flex;
    align-items: center;
    gap: 5px;
}

.lt-track {
    position: relative;
    height: 6px;
    background: var(--slate-line);
    border-radius: 6px;
    margin-bottom: .7rem;
}

.lt-fill {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    border-radius: 6px;
    background: linear-gradient(90deg, var(--ppf-green), var(--ppf-teal));
    transition: width .5s var(--ease);
}

.lt-markers {
    display: flex;
    justify-content: space-between;
    font-size: .62rem;
    color: var(--slate);
    font-weight: 600;
}

.lt-marker {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.lt-marker .lt-yr {
    font-weight: 700;
    color: var(--navy);
}

.lt-milestones {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-top: .6rem;
}

.lt-ms {
    font-size: .63rem;
    font-weight: 600;
    padding: .18rem .55rem;
    border-radius: 20px;
    border: 1px solid;
}
.lt-ms.ms-loan    { background: #FEF9C3; border-color: #FDE68A; color: #92400E; }
.lt-ms.ms-partial { background: var(--ppf-teal-soft); border-color: #5EEAD4; color: #134E4A; }
.lt-ms.ms-full    { background: var(--ppf-green-soft); border-color: #6EE7B7; color: #065f46; }
.lt-ms.ms-ext     { background: var(--ppf-lock-soft); border-color: #C4B5FD; color: #4C1D95; }


/* ═══════════════════════════════════════════
   [CSS12] LAYOUT-SHIFT PREVENTION
═══════════════════════════════════════════ */

.inputs-sticky {
    contain: layout;
}

.insights-body {
    contain: layout;
}

.yr-chart-wrap {
    min-height: 320px;
    position: relative;
}

#yrBars {
    display: block !important;
    width: 100% !important;
    min-width: 0 !important;
    height: auto !important;
    min-height: 260px;
    box-sizing: border-box;
    position: relative;
}

#vSummary {
    min-height: 360px;
}

#insightList {
    transition: min-height .2s ease;
}

@media (min-width: 768px) {
    .insights-body { overflow: visible; }
    #insightList {
        min-height: 200px;
        max-height: 420px;
        overflow-y: auto;
        overflow-x: hidden;
        scroll-behavior: smooth;
    }
}


/* ═══════════════════════════════════════════
   [CSS13] RESPONSIVE
═══════════════════════════════════════════ */

@media (max-width: 700px) {
    .ppf-stat-cards { grid-template-columns: 1fr 1fr; gap: 8px; }
    .psc-value { font-size: .9rem; }
    .ext-hd { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
    .ppf-stat-cards { grid-template-columns: 1fr 1fr; gap: 6px; }
    .ppf-stat-card { padding: .7rem .75rem; }
    .freq-grid { gap: 5px; }
    .freq-chip { font-size: .68rem; padding: .22rem .6rem; }
    .psc-icon { width: 28px; height: 28px; font-size: .8rem; }
    .psc-value { font-size: .82rem; }
    .psc-sub { font-size: .62rem; }
    .lt-markers { font-size: .56rem; }
}