/* ============================================================
   COMPONENTS — Buttons, Cards, Forms, Toast, Nav, Header, Footer
   ============================================================ */

/* ── Buttons ────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    padding: .875rem 1.5rem;
    font-family: var(--font-sans);
    font-size: .9375rem;
    font-weight: 600;
    line-height: 1.2;
    text-decoration: none;
    border-radius: var(--radius-lg);
    border: 1px solid transparent;
    cursor: pointer;
    transition: background var(--transition), color var(--transition),
                border-color var(--transition), box-shadow var(--transition),
                opacity var(--transition), transform var(--transition);
    white-space: nowrap;
    user-select: none;
}

.btn:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.btn:disabled {
    opacity: .55;
    cursor: not-allowed;
}

/* Primary */
.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #fff;
    border-color: transparent;
    box-shadow: var(--shadow-primary);
}
.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-color: transparent;
    color: #fff;
    text-decoration: none;
    transform: translateY(-1px);
}
.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

/* Secondary */
.btn-secondary {
    background: #fff;
    color: var(--color-primary-dark);
    border-color: var(--color-border-strong);
    box-shadow: var(--shadow-sm);
}
.btn-secondary:hover:not(:disabled) {
    background: #fff;
    color: var(--color-primary-dark);
    text-decoration: none;
    border-color: var(--color-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}
.btn-secondary:active:not(:disabled) {
    transform: translateY(0);
}

/* Ghost */
.btn-ghost {
    background: transparent;
    color: var(--color-text-muted);
    border-color: transparent;
}
.btn-ghost:hover:not(:disabled) {
    background: rgba(6,182,212,.08);
    color: var(--color-primary-dark);
    text-decoration: none;
}

/* Sizes */
.btn-sm  { padding: .625rem 1rem; font-size: .875rem; }
.btn-lg  { padding: 1rem 1.5rem; font-size: 1rem; }
.btn-full { width: 100%; justify-content: center; }

/* Icon button */
.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: .5rem;
    background: transparent;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    color: var(--color-text-muted);
    transition: color var(--transition), background var(--transition);
}
.btn-icon:hover { background: var(--color-bg-alt); color: var(--color-text); }
.btn-icon:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }

/* ── Form Elements ──────────────────────────────────────────── */
.form-label {
    display: block;
    font-size: .875rem;
    font-weight: 600;
    color: var(--color-primary-darker);
    margin-bottom: .375rem;
}

.form-hint {
    font-size: .8125rem;
    color: var(--color-text-muted);
    margin-top: .25rem;
}

.form-error {
    font-size: .875rem;
    color: var(--color-danger);
    margin-top: .375rem;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    min-width: 0;
    padding: .875rem;
    font-family: var(--font-sans);
    font-size: .9375rem;
    line-height: 1.5;
    color: var(--color-text);
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: 10px;
    transition: border-color var(--transition), box-shadow var(--transition);
    appearance: none;
    -webkit-appearance: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--color-text-muted);
    opacity: .7;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(6,182,212,.12);
}

.form-textarea {
    resize: vertical;
    min-height: 140px;
    font-family: var(--font-sans);
    overflow-wrap: anywhere;
}

.form-select {
    min-height: 2.75rem;
    padding-right: 2.5rem;
    background-image:
        linear-gradient(45deg, transparent 50%, var(--color-primary-dark) 50%),
        linear-gradient(135deg, var(--color-primary-dark) 50%, transparent 50%);
    background-position:
        calc(100% - 18px) 50%,
        calc(100% - 12px) 50%;
    background-size: 6px 6px, 6px 6px;
    background-repeat: no-repeat;
    cursor: pointer;
}

.form-textarea.font-mono {
    font-family: var(--font-mono);
    font-size: .875rem;
}

.form-group {
    border: none;
    margin: 0;
    padding: 0;
    margin-bottom: 1.5rem;
}

/* ── Card ───────────────────────────────────────────────────── */
.card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-card);
}

/* ── Site Header ────────────────────────────────────────────── */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-height);
    background: rgba(255,255,255,.94);
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    height: var(--header-height);
}

.site-logo {
    display: flex;
    align-items: center;
    gap: .45rem;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--color-text);
    white-space: nowrap;
}
.site-logo:hover { text-decoration: none; color: var(--color-primary); }

.logo-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #fff;
    box-shadow: var(--shadow-primary);
    flex-shrink: 0;
}
.logo-text {
    display: inline-flex;
    align-items: baseline;
    gap: .25rem;
}
.logo-brand { color: var(--color-primary); }
.logo-tld   { color: var(--color-primary-light); font-weight: 500; }
.logo-sep   { color: var(--color-border-strong); margin: 0 .25rem; }
.logo-tool  { color: var(--color-primary-darker); font-weight: 700; }

/* ── Tool Nav ───────────────────────────────────────────────── */
.tool-nav {
    display: flex;
    list-style: none;
    padding: 0;
    margin: 0;
    gap: .25rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: .375rem;
    padding: .5rem .75rem;
    font-size: .875rem;
    font-weight: 500;
    text-decoration: none;
    color: var(--color-text-muted);
    border-radius: var(--radius-lg);
    transition: background var(--transition), color var(--transition);
    white-space: nowrap;
}

.nav-link:hover,
.nav-link:focus-visible {
    background: rgba(6,182,212,.08);
    color: var(--color-primary-darker);
    text-decoration: none;
}

.nav-link.is-active {
    background: rgba(6,182,212,.10);
    color: var(--color-primary-dark);
}

.nav-icon {
    flex-shrink: 0;
}

/* Hamburger - hidden on desktop */
.nav-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--color-text);
    border-radius: var(--radius);
}
.nav-toggle:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }

@media (max-width: 640px) {
    .nav-toggle { display: flex; }
    .header-nav {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: #fff;
        border-bottom: 1px solid var(--color-border);
        padding: .75rem 1rem;
        box-shadow: var(--shadow-card);
        z-index: 99;
    }
    .header-nav.is-open { display: block; }
    .tool-nav { flex-direction: column; }
    .nav-link { padding: .625rem .75rem; font-size: 1rem; }
}

@media (min-width: 641px) and (max-width: 860px) {
    .nav-toggle { display: flex; }
    .header-nav {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: #fff;
        border-bottom: 1px solid var(--color-border);
        padding: .75rem 1rem;
        box-shadow: var(--shadow-card);
        z-index: 99;
    }
    .header-nav.is-open { display: block; }
    .tool-nav { flex-direction: column; }
    .nav-link { padding: .625rem .75rem; font-size: 1rem; }
}

/* ── Header actions (lang switch + CTA + toggle) ────────────── */
.header-actions {
    display: flex;
    align-items: center;
    gap: .5rem;
}

/* ── Language switcher ──────────────────────────────────────── */
.lang-switch {
    position: relative;
}
.lang-switch[open] .lang-switch-caret {
    transform: rotate(180deg);
}

.lang-switch-toggle {
    display: inline-flex;
    align-items: center;
    gap: .35rem;
    padding: .45rem .6rem;
    font-family: var(--font-sans);
    font-size: .8125rem;
    font-weight: 600;
    color: var(--color-text-muted);
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    list-style: none;
    user-select: none;
    transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.lang-switch-toggle::-webkit-details-marker { display: none; }
.lang-switch-toggle::marker { content: ""; }
.lang-switch-toggle:hover {
    background: rgba(6,182,212,.08);
    color: var(--color-primary-darker);
    border-color: var(--color-border-strong);
}
.lang-switch-toggle:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}
.lang-switch-globe { flex-shrink: 0; }
.lang-switch-caret {
    flex-shrink: 0;
    transition: transform var(--transition);
}

.lang-switch-menu {
    position: absolute;
    top: calc(100% + .4rem);
    right: 0;
    z-index: 200;
    min-width: 188px;
    list-style: none;
    margin: 0;
    padding: .35rem;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
}

.lang-switch-link {
    display: flex;
    align-items: center;
    gap: .6rem;
    padding: .5rem .6rem;
    font-size: .875rem;
    font-weight: 500;
    color: var(--color-text);
    text-decoration: none;
    border-radius: var(--radius);
    transition: background var(--transition), color var(--transition);
}
.lang-switch-link:hover,
.lang-switch-link:focus-visible {
    background: rgba(6,182,212,.08);
    color: var(--color-primary-darker);
    text-decoration: none;
    outline: none;
}
.lang-switch-link.is-active {
    color: var(--color-primary-dark);
    font-weight: 600;
}
.lang-switch-code {
    flex-shrink: 0;
    width: 1.9rem;
    font-size: .6875rem;
    font-weight: 700;
    letter-spacing: .04em;
    color: var(--color-text-muted);
}
.lang-switch-link.is-active .lang-switch-code { color: var(--color-primary-dark); }
.lang-switch-name { flex: 1; }
.lang-switch-check { flex-shrink: 0; color: var(--color-primary); }

@media (max-width: 480px) {
    .lang-switch-current { display: none; }
    .lang-switch-toggle { padding: .45rem .5rem; }
}

/* ── Site Footer ────────────────────────────────────────────── */
.site-footer {
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    padding: 2rem 0 1.5rem;
    margin-top: auto;
}

.footer-grid {
    display: grid;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

@media (min-width: 640px) {
    .footer-grid { grid-template-columns: 1fr auto; align-items: start; }
}

.footer-tagline { font-size: .9375rem; margin-bottom: .375rem; }
.footer-tech    { font-size: .8125rem; color: var(--color-text-muted); }

.footer-nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: .5rem 1.25rem;
}

.footer-nav a {
    font-size: .875rem;
    color: var(--color-text-muted);
    text-decoration: none;
}
.footer-nav a:hover { color: var(--color-primary); text-decoration: underline; }

.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding-top: 1rem;
    font-size: .8125rem;
    color: var(--color-text-muted);
}

/* ── Toast Notifications ────────────────────────────────────── */
#toast-container {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: .5rem;
    max-width: 360px;
    width: calc(100vw - 3rem);
}

.toast {
    padding: .75rem 1rem;
    border-radius: var(--radius);
    font-size: .875rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transform: translateY(8px);
    transition: opacity .2s ease, transform .2s ease;
    pointer-events: none;
}

.toast.toast-visible {
    opacity: 1;
    transform: translateY(0);
}

.toast-success { background: var(--color-success); color: #fff; }
.toast-error   { background: var(--color-danger);  color: #fff; }
.toast-warning { background: var(--color-warning); color: #fff; }
.toast-info    { background: var(--color-primary); color: #fff; }

/* ── Breadcrumb ─────────────────────────────────────────────── */
.breadcrumb ol {
    list-style: none;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: .25rem;
    font-size: .875rem;
    color: var(--color-text-muted);
    margin-bottom: 1rem;
}

.breadcrumb li + li::before {
    content: "/";
    margin-right: .25rem;
    color: var(--color-border);
}

.breadcrumb a { color: var(--color-text-muted); }
.breadcrumb a:hover { color: var(--color-primary); }

/* ── Tables ─────────────────────────────────────────────────── */
.table-wrapper { overflow-x: auto; }

.spec-table,
.compare-table {
    width: 100%;
    border-collapse: collapse;
    font-size: .9rem;
    margin: 1rem 0 1.5rem;
}

.spec-table th,
.compare-table th {
    background: var(--color-bg-alt);
    padding: .625rem .875rem;
    text-align: left;
    font-size: .8125rem;
    text-transform: uppercase;
    letter-spacing: .05em;
    color: var(--color-text-muted);
    border-bottom: 1px solid var(--color-border);
}

.spec-table td,
.compare-table td {
    padding: .625rem .875rem;
    border-bottom: 1px solid var(--color-border);
    vertical-align: top;
}

.spec-table tr:last-child td,
.compare-table tr:last-child td { border-bottom: none; }
.spec-table tr:hover td,
.compare-table tr:hover td { background: var(--color-bg-alt); }

.check-yes { color: var(--color-success); font-weight: 600; }
.check-no  { color: var(--color-danger);  font-weight: 600; }

/* ── Prose (long-form content) ──────────────────────────────── */
.prose {
    max-width: 72ch;
    margin: 2.5rem auto;
}
.prose h2 { margin-top: 2.5rem; margin-bottom: .75rem; }
.prose h2:first-child { margin-top: 0; }
.prose ul, .prose ol { margin-bottom: 1rem; }
.prose li { margin-bottom: .375rem; }