/*
 * css/styles.css
 * Design system de Morse-Code.co.uk.
 * Bootstrap cobreix el grid, els components base i els estats de formulari.
 * Aquest fitxer només defineix la identitat visual pròpia: tokens de color,
 * tipografia, i els components que Bootstrap no ofereix (morse output,
 * signal-pulse decoration, tool cards, audio panel...).
 */

/* ------------------------------------------------------------------ */
/* Fonts */
/* ------------------------------------------------------------------ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ------------------------------------------------------------------ */
/* Design tokens */
/* ------------------------------------------------------------------ */

:root {
    /* Colour system: light theme, one signal accent colour */
    --color-ink: #14171f;              /* headings, high-emphasis text */
    --color-body: #4b5160;             /* body / secondary text */
    --color-muted: #8b93a3;            /* tertiary text, placeholders */
    --color-bg: #ffffff;
    --color-surface: #f6f7f9;          /* section backgrounds */
    --color-surface-raised: #ffffff;
    --color-border: #e3e6ec;

    --color-signal: #ff5a1f;           /* primary accent: "signal" orange */
    --color-signal-dark: #db4712;
    --color-signal-soft: #fff1ea;

    --color-success: #1a7f4e;
    --color-success-soft: #e9f7f0;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: 'JetBrains Mono', "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

    /* Radii & shadows, used consistently across all custom components */
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --shadow-card: 0 1px 2px rgba(20, 23, 31, 0.04), 0 8px 24px rgba(20, 23, 31, 0.06);
    --shadow-card-hover: 0 4px 10px rgba(20, 23, 31, 0.06), 0 16px 32px rgba(20, 23, 31, 0.09);
}

/* ------------------------------------------------------------------ */
/* Base */
/* ------------------------------------------------------------------ */

body {
    font-family: var(--font-sans);
    color: var(--color-body);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--color-ink);
    font-weight: 700;
    letter-spacing: -0.01em;
}

a {
    color: var(--color-signal-dark);
}

::selection {
    background: var(--color-signal-soft);
    color: var(--color-ink);
}

/* Visible, consistent focus ring for every interactive element */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
.btn:focus-visible {
    outline: 2px solid var(--color-signal);
    outline-offset: 2px;
}

/* ------------------------------------------------------------------ */
/* Bootstrap overrides: map the design system onto Bootstrap variables */
/* ------------------------------------------------------------------ */

.btn-primary {
    --bs-btn-bg: var(--color-signal);
    --bs-btn-border-color: var(--color-signal);
    --bs-btn-hover-bg: var(--color-signal-dark);
    --bs-btn-hover-border-color: var(--color-signal-dark);
    --bs-btn-active-bg: var(--color-signal-dark);
    --bs-btn-active-border-color: var(--color-signal-dark);
    --bs-btn-disabled-bg: var(--color-signal);
    --bs-btn-disabled-border-color: var(--color-signal);
    font-weight: 600;
}

.btn-outline-secondary {
    --bs-btn-color: var(--color-body);
    --bs-btn-border-color: var(--color-border);
    --bs-btn-hover-bg: var(--color-surface);
    --bs-btn-hover-border-color: var(--color-muted);
    --bs-btn-hover-color: var(--color-ink);
}

.form-control:focus,
.form-range:focus::-webkit-slider-thumb {
    border-color: var(--color-signal);
    box-shadow: 0 0 0 0.2rem var(--color-signal-soft);
}

.form-range::-webkit-slider-thumb {
    background-color: var(--color-signal);
}
.form-range::-moz-range-thumb {
    background-color: var(--color-signal);
}

.link-secondary:hover,
.footer-link:hover {
    color: var(--color-signal-dark) !important;
}

/* ------------------------------------------------------------------ */
/* Site header / wordmark */
/* ------------------------------------------------------------------ */

.site-header {
    background: var(--color-bg);
}

.brand-mark {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-ink) !important;
    font-weight: 800;
    font-size: 1.15rem;
    letter-spacing: -0.01em;
}

/* The little dot-dash glyph in the logo: ".–" rendered as two signal pulses */
.brand-mark .brand-pulse {
    display: inline-flex;
    align-items: center;
    gap: 3px;
}
.brand-mark .brand-pulse .dot,
.brand-mark .brand-pulse .dash {
    background: var(--color-signal);
    display: inline-block;
    border-radius: 2px;
}
.brand-mark .brand-pulse .dot { width: 6px; height: 6px; border-radius: 50%; }
.brand-mark .brand-pulse .dash { width: 16px; height: 6px; }

.main-nav .nav-link {
    color: var(--color-body);
    font-weight: 500;
    font-size: 0.94rem;
}
.main-nav .nav-link:hover,
.main-nav .nav-link.active {
    color: var(--color-signal-dark);
}

/* ------------------------------------------------------------------ */
/* Hero */
/* ------------------------------------------------------------------ */

.hero-section {
    background:
        radial-gradient(circle at 100% 0%, var(--color-signal-soft) 0%, transparent 45%),
        var(--color-bg);
    padding-top: 3rem;
    padding-bottom: 1.5rem;
    position: relative;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-signal-dark);
    background: var(--color-signal-soft);
    border-radius: 999px;
    padding: 0.3rem 0.75rem;
    margin-bottom: 0.9rem;
}

.hero-title {
    font-size: clamp(1.9rem, 4.2vw, 2.75rem);
    margin-bottom: 0.6rem;
}

.hero-subtitle {
    color: var(--color-body);
    font-size: 1.05rem;
    max-width: 620px;
    margin-bottom: 0;
}

/* ------------------------------------------------------------------ */
/* Tool card (translator) */
/* ------------------------------------------------------------------ */

.tool-card {
    background: var(--color-surface-raised);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
}

.tool-card .tool-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    margin-bottom: 0.9rem;
}

.tool-card-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-ink);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Small directional arrow shown between input and output on each panel */
.tool-flow-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-muted);
    margin: 0.35rem 0;
    font-size: 0.85rem;
}
.tool-flow-arrow svg { width: 16px; height: 16px; }

.tool-textarea {
    border-radius: var(--radius-sm);
    border-color: var(--color-border);
    resize: vertical;
}

/* The Morse output deserves to look like a result, not like plain text */
.morse-result {
    font-family: var(--font-mono);
    font-size: 1.05rem;
    letter-spacing: 0.03em;
    line-height: 1.7;
    background: var(--color-surface);
    border: 1px dashed var(--color-border);
    border-radius: var(--radius-sm);
    word-break: break-word;
    white-space: pre-wrap;
}

.unsupported-note {
    font-size: 0.82rem;
    color: var(--color-signal-dark);
    background: var(--color-signal-soft);
    border-radius: var(--radius-sm);
    padding: 0.5rem 0.75rem;
    display: none;
}
.unsupported-note.is-visible {
    display: block;
}

.copy-feedback {
    font-size: 0.8rem;
    color: var(--color-success);
    font-weight: 600;
}

/* ------------------------------------------------------------------ */
/* Audio panel */
/* ------------------------------------------------------------------ */

.audio-panel {
    background: var(--color-ink);
    color: #fff;
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
}

.audio-panel .tool-card-title {
    color: #fff;
}

.audio-panel .form-label {
    color: rgba(255, 255, 255, 0.65);
}

.audio-panel .btn-outline-light {
    --bs-btn-border-color: rgba(255, 255, 255, 0.35);
    --bs-btn-hover-bg: rgba(255, 255, 255, 0.12);
    --bs-btn-hover-border-color: rgba(255, 255, 255, 0.5);
}

/* Decorative waveform bars — purely visual, communicates "audio" at a glance */
.waveform {
    display: flex;
    align-items: center;
    gap: 3px;
    height: 28px;
}
.waveform .bar {
    width: 3px;
    border-radius: 2px;
    background: rgba(255, 255, 255, 0.35);
    transition: background-color 0.15s ease, transform 0.15s ease;
}
.waveform.is-playing .bar {
    background: var(--color-signal);
    animation: waveform-pulse 0.9s ease-in-out infinite;
}
.waveform .bar:nth-child(2n) { animation-delay: 0.1s; }
.waveform .bar:nth-child(3n) { animation-delay: 0.2s; }
.waveform .bar:nth-child(4n) { animation-delay: 0.3s; }

@keyframes waveform-pulse {
    0%, 100% { transform: scaleY(0.4); }
    50% { transform: scaleY(1); }
}

.playback-status {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: rgba(255, 255, 255, 0.65);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ------------------------------------------------------------------ */
/* Feature / tool cards grid (secondary content) */
/* ------------------------------------------------------------------ */

.section-label {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-signal-dark);
    margin-bottom: 0.4rem;
    display: block;
}

.feature-card {
    display: block;
    height: 100%;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    text-decoration: none;
    transition: box-shadow 0.15s ease, transform 0.15s ease, border-color 0.15s ease;
}
.feature-card:hover {
    box-shadow: var(--shadow-card-hover);
    border-color: var(--color-border);
    transform: translateY(-2px);
}
.feature-card-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: var(--color-signal-soft);
    color: var(--color-signal-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.9rem;
    font-family: var(--font-mono);
    font-weight: 600;
}
.feature-card-title {
    color: var(--color-ink);
    font-weight: 700;
    font-size: 0.98rem;
    margin-bottom: 0.3rem;
}
.feature-card-desc {
    color: var(--color-body);
    font-size: 0.88rem;
    margin-bottom: 0;
}

/* ------------------------------------------------------------------ */
/* Morse alphabet / numbers table */
/* ------------------------------------------------------------------ */

.morse-table code {
    font-family: var(--font-mono);
    letter-spacing: 2px;
    color: var(--color-ink);
}

/* ------------------------------------------------------------------ */
/* SOS big display */
/* ------------------------------------------------------------------ */

.sos-code-display {
    font-family: var(--font-mono);
    letter-spacing: 8px;
    color: var(--color-ink);
}

/* ------------------------------------------------------------------ */
/* Content pages (About / Contact) */
/* ------------------------------------------------------------------ */

.content-page h2 {
    font-size: 1.25rem;
    margin-top: 2rem;
}
.content-page p {
    max-width: 720px;
}

.company-card {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

/* ------------------------------------------------------------------ */
/* Footer */
/* ------------------------------------------------------------------ */

.site-footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
}
.site-footer .footer-heading {
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-muted);
    margin-bottom: 0.75rem;
}
.site-footer .footer-link {
    color: var(--color-body);
    text-decoration: none;
    font-size: 0.9rem;
    display: block;
    margin-bottom: 0.5rem;
}
.site-footer .footer-company {
    font-size: 0.85rem;
    color: var(--color-muted);
}