/* ============================================================
   CarbonTrack — main.css
   Shared components: buttons, forms, auth, landing, lang switcher
   ============================================================ */

/* ---------- Buttons ---------- */
.ct-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    font-family: var(--font-body); font-weight: 600; font-size: 0.95rem;
    padding: 13px 26px; border-radius: var(--radius-sm); border: 1.5px solid transparent;
    cursor: pointer; transition: all 0.15s ease; white-space: nowrap; text-align: center;
}
.ct-btn-primary { background: var(--ink-950); color: var(--paper); }
.ct-btn-primary:hover { background: var(--ink-800); transform: translateY(-1px); }
.ct-btn-accent { background: var(--signal-amber); color: var(--ink-950); }
.ct-btn-accent:hover { background: var(--signal-amber-dim); transform: translateY(-1px); }
.ct-btn-ghost { background: transparent; color: var(--ink-950); border-color: var(--ink-700); }
.ct-btn-ghost:hover { background: var(--ink-950); color: var(--paper); }
.ct-btn-on-dark { color: var(--paper); border-color: var(--ink-600); }
.ct-btn-on-dark:hover { background: var(--paper); color: var(--ink-950); }
.ct-btn-block { width: 100%; }
.ct-btn-sm { padding: 9px 18px; font-size: 0.85rem; }

a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
    outline: 2px solid var(--signal-amber); outline-offset: 2px;
}

/* ---------- Forms ---------- */
.ct-field { margin-bottom: 18px; }
.ct-field label {
    display: block; font-size: 0.8rem; font-weight: 600; color: var(--ink-700);
    margin-bottom: 7px; text-transform: uppercase; letter-spacing: 0.04em;
}
.ct-field input, .ct-field select, .ct-field textarea {
    width: 100%; padding: 12px 14px; border: 1.5px solid var(--ink-100);
    border-radius: var(--radius-sm); font-family: var(--font-body); font-size: 0.97rem;
    background: #fff; color: var(--ink-950); transition: border-color 0.15s ease;
}
.ct-field input:focus, .ct-field select:focus, .ct-field textarea:focus {
    outline: none; border-color: var(--ink-950);
}
.ct-field-split { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.ct-suffix-wrap { position: relative; }
.ct-suffix {
    position: absolute; right: 14px; top: 50%; transform: translateY(-50%);
    font-size: 0.82rem; color: var(--ink-400); font-family: var(--font-mono); pointer-events: none;
}
.ct-checkbox { display: flex; align-items: center; gap: 8px; font-size: 0.9rem; color: var(--ink-600); margin-bottom: 20px; cursor: pointer; }
.ct-checkbox input { width: auto; }

/* ---------- Alerts ---------- */
.ct-alert { padding: 13px 16px; border-radius: var(--radius-sm); font-size: 0.88rem; margin-bottom: 20px; }
.ct-alert-error { background: rgba(194,74,63,0.1); color: var(--alert-red); border: 1px solid rgba(194,74,63,0.25); }
.ct-alert-success { background: rgba(76,140,130,0.1); color: var(--slate-teal); border: 1px solid rgba(76,140,130,0.25); }

/* ---------- Brand ---------- */
.ct-brand { display: flex; align-items: center; gap: 9px; }
.ct-brand-mark { font-size: 1.3rem; color: var(--signal-amber-dim); }
.ct-brand-name { font-family: var(--font-display); font-weight: 700; font-size: 1.15rem; letter-spacing: -0.01em; }

/* ---------- Language switcher ---------- */
.ct-lang-switcher { position: relative; }
.ct-lang-toggle {
    background: transparent; border: 1px solid var(--ink-700); color: var(--ink-300);
    padding: 8px 14px; border-radius: var(--radius-sm); font-size: 0.85rem; cursor: pointer;
    font-family: var(--font-body); display: flex; align-items: center; gap: 6px; width: 100%;
    justify-content: center;
}
.ct-lang-toggle:hover { border-color: var(--ink-400); color: var(--paper); }
.ct-lang-menu {
    position: absolute; bottom: calc(100% + 6px); left: 0; right: 0;
    background: var(--ink-900); border: 1px solid var(--ink-700); border-radius: var(--radius-sm);
    overflow: hidden; display: none; z-index: 50;
}
.ct-lang-menu.open { display: block; }
.ct-lang-option {
    display: block; width: 100%; text-align: left; padding: 10px 14px; background: transparent;
    border: none; color: var(--ink-300); font-size: 0.88rem; cursor: pointer; font-family: var(--font-body);
}
.ct-lang-option:hover { background: var(--ink-800); color: var(--signal-amber); }

/* light variant (on paper backgrounds, e.g. landing nav) */
.ct-lang-switcher-light .ct-lang-toggle { border-color: var(--ink-100); color: var(--ink-600); }
.ct-lang-switcher-light .ct-lang-toggle:hover { border-color: var(--ink-400); color: var(--ink-950); }
.ct-lang-switcher-light .ct-lang-menu { background: #fff; border-color: var(--ink-100); }
.ct-lang-switcher-light .ct-lang-option { color: var(--ink-700); }
.ct-lang-switcher-light .ct-lang-option:hover { background: var(--paper); color: var(--signal-amber-dim); }

/* ============================================================
   Auth pages (login/register)
   ============================================================ */
.ct-public-wrap { min-height: 100vh; }
.ct-auth-wrap { min-height: 100vh; display: grid; grid-template-columns: 1fr 1fr; }
.ct-auth-side {
    background: var(--ink-950); color: var(--paper); padding: 56px;
    display: flex; flex-direction: column; justify-content: space-between; position: relative; overflow: hidden;
}
.ct-auth-side .ct-brand { color: var(--paper); margin-bottom: 60px; }
.ct-auth-side .ct-brand-mark { color: var(--signal-amber); }
.ct-auth-side h2 { color: var(--paper); font-size: 1.9rem; max-width: 380px; font-family: var(--font-display); line-height: 1.2; }
.ct-auth-decor { position: absolute; right: -60px; bottom: -60px; width: 320px; height: 320px; border: 1px solid var(--ink-700); border-radius: 50%; opacity: 0.5; }
.ct-auth-decor::before { content: ''; position: absolute; inset: 40px; border: 1px solid var(--ink-700); border-radius: 50%; }

.ct-auth-form-side { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 40px; position: relative; }
.ct-auth-lang { position: absolute; top: 24px; right: 24px; width: 150px; }
.ct-auth-box { width: 100%; max-width: 400px; }
.ct-auth-box h1 { font-size: 1.6rem; margin-bottom: 8px; }
.ct-auth-sub { color: var(--ink-400); font-size: 0.95rem; margin-bottom: 32px; }
.ct-auth-foot { text-align: center; margin-top: 24px; font-size: 0.9rem; color: var(--ink-400); }
.ct-auth-foot a { color: var(--ink-950); font-weight: 600; }

/* ============================================================
   Landing page
   ============================================================ */
.ct-landing { min-height: 100vh; }
.ct-landing-nav {
    display: flex; align-items: center; justify-content: space-between;
    padding: 18px 40px; border-bottom: 1px solid var(--paper-dim);
}
.ct-landing-actions { display: flex; align-items: center; gap: 14px; }
.ct-landing-actions .ct-lang-switcher { width: 150px; }
.ct-landing-hero {
    max-width: 1180px; margin: 0 auto; padding: 70px 40px;
    display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center;
}
.ct-eyebrow { font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--signal-amber-dim); margin-bottom: 14px; }
.ct-hero-copy h1 { font-size: 2.7rem; margin-bottom: 22px; line-height: 1.1; }
.ct-hero-sub { font-size: 1.08rem; color: var(--ink-600); max-width: 540px; margin-bottom: 30px; }
.ct-hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }
.ct-hero-gauge { display: flex; justify-content: center; }
.ct-gauge-svg { width: 100%; max-width: 360px; }
.ct-gauge-needle line, .ct-gauge-needle circle { animation: ctNeedle 1.4s cubic-bezier(.2,1.4,.4,1) forwards; transform-origin: 180px 180px; }
@keyframes ctNeedle { 0% { transform: rotate(-95deg); } 100% { transform: rotate(28deg); } }

/* ---------- Responsive ---------- */
@media (max-width: 880px) {
    .ct-auth-wrap { grid-template-columns: 1fr; }
    .ct-auth-side { display: none; }
    .ct-landing-hero { grid-template-columns: 1fr; gap: 36px; padding: 40px 24px; }
    .ct-hero-copy h1 { font-size: 2rem; }
    .ct-landing-nav { padding: 16px 24px; }
    .ct-field-split { grid-template-columns: 1fr; }
}