/* ════════════════════════════════════════
   Countdown Solver – Shared Stylesheet
   ════════════════════════════════════════ */

:root {
    --cd-dark:  #0b2e5e;
    --cd-blue:  #1a4f8a;
    --cd-mid:   #2471a3;
    --cd-gold:  #f0b429;
    --cd-amber: #e67e22;
}

body {
    background: #eef2f7;
    font-family: 'Segoe UI', Arial, sans-serif;
    color: #1a1a2e;
}

/* ── Site Header (home page) ── */
.site-header {
    background: var(--cd-dark);
    border-bottom: 4px solid var(--cd-gold);
    padding: 1.25rem 0;
}
.site-header h1 {
    font-size: clamp(1.6rem, 4vw, 2.4rem);
    font-weight: 800;
    letter-spacing: 1px;
    color: #fff;
    margin: 0;
}
.site-header .tagline {
    color: var(--cd-gold);
    font-size: 0.9rem;
    margin-top: 0.2rem;
}
.header-clock {
    font-size: 2.5rem;
    color: var(--cd-gold);
}

/* ── Site Nav (inner pages) ── */
.site-nav {
    background: var(--cd-dark);
    border-bottom: 3px solid var(--cd-gold);
}
.site-nav .navbar-brand {
    color: #fff;
    font-weight: 800;
    font-size: 1.15rem;
}
.site-nav .navbar-brand:hover { color: var(--cd-gold); }
.site-nav .nav-link { color: rgba(255,255,255,.8) !important; }
.site-nav .nav-link:hover,
.site-nav .nav-link.active { color: var(--cd-gold) !important; }
.site-nav .navbar-toggler { border-color: rgba(255,255,255,.3); }
.site-nav .navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255,255,255,0.75%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ── Page Hero (inner pages) ── */
.page-hero {
    background: var(--cd-dark);
    border-bottom: 4px solid var(--cd-gold);
    padding: 1.75rem 0 1.25rem;
    color: #fff;
}
.page-hero h1 {
    font-size: clamp(1.4rem, 3vw, 2rem);
    font-weight: 800;
    margin: 0;
}
.page-hero .lead {
    color: var(--cd-gold);
    font-size: .9rem;
    margin: .25rem 0 0;
}

/* ── Content Cards (inner pages) ── */
.content-card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 18px rgba(0,0,0,.1);
    padding: 2rem;
    margin-bottom: 1.5rem;
}
.content-card h2 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--cd-dark);
    border-bottom: 3px solid var(--cd-gold);
    padding-bottom: .4rem;
    margin-bottom: 1rem;
}
.content-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--cd-blue);
    margin-top: 1.4rem;
    margin-bottom: .4rem;
}
.content-card h3:first-child { margin-top: 0; }

/* ── Solver Cards (home page) ── */
.solver-card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 18px rgba(0,0,0,.1);
    padding: 1.5rem;
    height: 100%;
}
.solver-card h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--cd-dark);
    border-bottom: 3px solid var(--cd-gold);
    padding-bottom: .4rem;
    margin-bottom: 1rem;
}

/* ── Tiles ── */
.tile-row {
    display: grid;
    gap: 5px;
    margin-bottom: .75rem;
}
.letters-row { grid-template-columns: repeat(9, 1fr); }
.numbers-row { grid-template-columns: repeat(6, 1fr); }
.target-row  { grid-template-columns: minmax(80px, 130px); }

.tile {
    aspect-ratio: 1;
    background: var(--cd-blue);
    color: #fff;
    border: 2px solid transparent;
    border-radius: 7px;
    text-align: center;
    font-size: clamp(.9rem, 2.5vw, 1.35rem);
    font-weight: 700;
    text-transform: uppercase;
    padding: 0;
    line-height: 1;
    outline: none;
    width: 100%;
    transition: background .15s, box-shadow .15s;
    -moz-appearance: textfield;
    appearance: textfield;
}
.tile::-webkit-outer-spin-button,
.tile::-webkit-inner-spin-button { -webkit-appearance: none; }
.tile::placeholder { color: rgba(255,255,255,.35); font-size: .75em; font-weight: 400; text-transform: none; }
.tile:focus {
    background: var(--cd-mid);
    border-color: var(--cd-gold);
    box-shadow: 0 0 0 3px rgba(240,180,41,.4);
}
.tile-target {
    aspect-ratio: unset;
    height: 52px;
    font-size: 1.3rem;
}

/* ── Buttons ── */
.btn-solve {
    background: var(--cd-gold);
    color: var(--cd-dark);
    font-weight: 700;
    border: none;
    border-radius: 8px;
    padding: .55rem 1.6rem;
    transition: background .15s, transform .1s;
}
.btn-solve:hover  { background: var(--cd-amber); color: #fff; transform: translateY(-1px); }
.btn-solve:active { transform: translateY(0); }
.btn-clear {
    background: transparent;
    border: 2px solid var(--cd-blue);
    color: var(--cd-blue);
    font-weight: 600;
    border-radius: 8px;
    padding: .5rem 1rem;
    transition: background .15s;
}
.btn-clear:hover { background: var(--cd-blue); color: #fff; }

/* ── Hint text ── */
.hint-text {
    font-size: .78rem;
    color: #6c757d;
    margin-top: .3rem;
    min-height: 1.2em;
}
.hint-text.ok    { color: #1e8449; }
.hint-text.warn  { color: #c0392b; }

/* ── Ads placeholder ── */
.ads-wrap {
    background: #f5f7fa;
    border: 2px dashed #c5cfe0;
    border-radius: 10px;
    padding: 1.25rem;
    text-align: center;
    color: #8899aa;
    font-size: .83rem;
    margin: 1.5rem 0;
}

/* ── Results ── */
.results-card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 18px rgba(0,0,0,.1);
    padding: 1.5rem;
}
.results-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--cd-dark);
    border-bottom: 3px solid var(--cd-gold);
    padding-bottom: .4rem;
    margin-bottom: 1rem;
}

/* Word results */
.word-group { margin-bottom: 1rem; }
.word-group-label {
    display: inline-block;
    background: var(--cd-dark);
    color: #fff;
    font-size: .78rem;
    font-weight: 700;
    padding: 2px 10px;
    border-radius: 4px;
    margin-bottom: .35rem;
}
.word-badge {
    display: inline-block;
    background: var(--cd-blue);
    color: #fff;
    padding: 3px 11px;
    border-radius: 5px;
    margin: 2px 2px;
    font-size: .88rem;
    font-weight: 600;
    letter-spacing: .5px;
}

/* Maths results */
.solution-block {
    background: #f4f8fc;
    border-left: 4px solid var(--cd-blue);
    border-radius: 0 6px 6px 0;
    padding: .75rem 1rem;
    margin-bottom: .75rem;
}
.solution-label {
    font-size: .8rem;
    font-weight: 700;
    color: #fff;
    background: var(--cd-dark);
    padding: 1px 8px;
    border-radius: 4px;
    margin-right: .4rem;
}
.solution-step {
    font-family: 'Courier New', Courier, monospace;
    font-size: .92rem;
    color: var(--cd-dark);
    margin: 3px 0;
}

/* Loading spinner */
.spinner-cd { color: var(--cd-gold); }

/* ── FAQ accordion (home page) ── */
.faq-section { margin-bottom: 3rem; }
.faq-section h2 { color: var(--cd-dark); }
.accordion-button:not(.collapsed) {
    background: var(--cd-dark);
    color: #fff;
}
.accordion-button:not(.collapsed)::after {
    filter: brightness(10);
}
.accordion-button:focus { box-shadow: 0 0 0 3px rgba(240,180,41,.35); }

/* ── Scoring table ── */
.score-table th { background: var(--cd-dark); color: #fff; }
.score-table td:first-child { font-weight: 600; }

/* ── Footer ── */
footer {
    background: var(--cd-dark);
    color: rgba(255,255,255,.7);
    padding: 2rem 0 1rem;
    margin-top: 3rem;
    font-size: .88rem;
}
footer a { color: var(--cd-gold); text-decoration: none; }
footer a:hover { color: #fff; text-decoration: underline; }
footer strong { color: #fff; }
footer .footer-nav { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: .5rem 1.25rem; }
footer .footer-nav li::before { content: none; }


/* ── Mobile tile layout ── */
@media (max-width: 575px) {

    /* 9 letter tiles → 3×3 grid: tiles are ~95px each on a 375px phone */
    .letters-row {
        grid-template-columns: repeat(3, 1fr);
        max-width: 320px;
    }

    /* 6 number tiles → 3×3 grid: 2 rows of 3 */
    .numbers-row {
        grid-template-columns: repeat(3, 1fr);
        max-width: 240px;
    }

    /* Slightly larger font in the tiles now they have room */
    .tile {
        font-size: 1.5rem;
    }
}