/* zi.cr — URL Shortener Styles */

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg:        #0d0f14;
    --surface:   #161a23;
    --surface2:  #1e2330;
    --border:    #2a3044;
    --accent:    #6c63ff;
    --accent-h:  #8a83ff;
    --accent2:   #00d4aa;
    --danger:    #ff5c72;
    --text:      #e8eaf0;
    --text-dim:  #8892a4;
    --text-faint:#4a5568;
    --radius:    10px;
    --shadow:    0 4px 24px rgba(0,0,0,.35);
    --transition: 180ms ease;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
    font-family: 'Inter', 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* ---- Layout ---- */
.container {
    width: 100%;
    max-width: 680px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ---- Header ---- */
header {
    padding: 28px 0 20px;
    text-align: center;
    border-bottom: 1px solid var(--border);
}

.logo {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -.04em;
    color: var(--text);
    text-decoration: none;
}

.logo span { color: var(--accent); }

.tagline {
    font-size: .85rem;
    color: var(--text-dim);
    margin-top: 4px;
}

/* ---- Main ---- */
main {
    flex: 1;
    padding: 48px 0 64px;
}

/* ---- Card ---- */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: var(--shadow);
}

/* ---- Tabs ---- */
.tabs {
    display: flex;
    gap: 4px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 4px;
    margin-bottom: 28px;
}

.tab-btn {
    flex: 1;
    padding: 9px 16px;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: var(--text-dim);
    font-size: .875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.tab-btn:hover { color: var(--text); }

.tab-btn.active {
    background: var(--surface2);
    color: var(--text);
    box-shadow: 0 1px 4px rgba(0,0,0,.3);
}

.tab-btn .badge {
    font-size: .7rem;
    font-weight: 600;
    background: var(--accent);
    color: #fff;
    padding: 1px 6px;
    border-radius: 99px;
    letter-spacing: .02em;
}

/* ---- Form ---- */
.form-group { margin-bottom: 18px; }

label {
    display: block;
    font-size: .8rem;
    font-weight: 600;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: .06em;
    margin-bottom: 8px;
}

input[type="url"],
input[type="text"] {
    width: 100%;
    padding: 13px 16px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: .95rem;
    font-family: inherit;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}

input[type="url"]::placeholder,
input[type="text"]::placeholder { color: var(--text-faint); }

input[type="url"]:focus,
input[type="text"]:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(108,99,255,.18);
}

/* Prefix input group */
.input-group {
    display: flex;
    align-items: center;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.input-group:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(108,99,255,.18);
}

.input-prefix {
    padding: 13px 14px;
    background: var(--surface2);
    color: var(--text-dim);
    font-size: .875rem;
    white-space: nowrap;
    border-right: 1px solid var(--border);
    user-select: none;
}

.input-group input[type="text"] {
    border: none;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
}

.input-group input[type="text"]:focus {
    box-shadow: none;
}

.hint {
    font-size: .78rem;
    color: var(--text-faint);
    margin-top: 6px;
}

/* ---- Button ---- */
.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 14px 24px;
    border: none;
    border-radius: 8px;
    font-size: .95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    letter-spacing: .01em;
    text-decoration: none;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
}
.btn-primary:hover { background: var(--accent-h); transform: translateY(-1px); }
.btn-primary:active { transform: none; }

.btn-square {
    background: #006aff;
    color: #fff;
}
.btn-square:hover  { background: #0056cc; transform: translateY(-1px); }
.btn-square:active { transform: none; }

.btn:disabled {
    opacity: .5;
    cursor: not-allowed;
    transform: none !important;
}

/* ---- Result box ---- */
.result-box {
    display: none;
    margin-top: 24px;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 18px 20px;
    animation: slideIn .2s ease;
}

.result-box.show { display: block; }

@keyframes slideIn {
    from { opacity: 0; transform: translateY(-6px); }
    to   { opacity: 1; transform: translateY(0); }
}

.result-label {
    font-size: .75rem;
    font-weight: 600;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: .07em;
    margin-bottom: 10px;
}

.result-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.result-url {
    flex: 1;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--accent2);
    word-break: break-all;
    text-decoration: none;
}

.result-url:hover { text-decoration: underline; }

.copy-btn {
    flex-shrink: 0;
    padding: 7px 14px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-dim);
    font-size: .8rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}
.copy-btn:hover { color: var(--text); border-color: var(--accent); }
.copy-btn.copied { color: var(--accent2); border-color: var(--accent2); }

/* ---- Alert / Error ---- */
.alert {
    display: none;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: .875rem;
    margin-top: 16px;
    animation: slideIn .2s ease;
}

.alert.show { display: block; }

.alert-error {
    background: rgba(255,92,114,.1);
    border: 1px solid rgba(255,92,114,.3);
    color: #ff8a97;
}

.alert-success {
    background: rgba(0,212,170,.1);
    border: 1px solid rgba(0,212,170,.3);
    color: #00d4aa;
}

/* ---- Notice (top) ---- */
.notice {
    background: rgba(0,212,170,.08);
    border: 1px solid rgba(0,212,170,.2);
    border-radius: 8px;
    padding: 14px 18px;
    font-size: .875rem;
    color: var(--accent2);
    margin-bottom: 28px;
    display: none;
    animation: slideIn .2s ease;
}
.notice.show { display: block; }

/* ---- Features ---- */
.features {
    margin-top: 40px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

.feature {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
}

.feature-icon {
    font-size: 1.4rem;
    margin-bottom: 10px;
}

.feature-title {
    font-size: .9rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.feature-desc {
    font-size: .8rem;
    color: var(--text-dim);
    line-height: 1.5;
}

/* ---- Footer ---- */
footer {
    border-top: 1px solid var(--border);
    padding: 20px 0;
    text-align: center;
    font-size: .78rem;
    color: var(--text-faint);
}

footer a { color: var(--text-dim); text-decoration: none; }
footer a:hover { color: var(--text); }

/* ---- Loading spinner ---- */
.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255,255,255,.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin .6s linear infinite;
    display: none;
}
.spinner.show { display: inline-block; }

@keyframes spin { to { transform: rotate(360deg); } }

/* ---- Responsive ---- */
@media (max-width: 540px) {
    .card { padding: 22px 18px; }
    .features { grid-template-columns: 1fr; }
    .result-row { flex-direction: column; align-items: stretch; }
    .copy-btn { text-align: center; }
}