:root {
    --text: #111827;
    --muted: #6b7280;

    --pink-50: #fff1f6;
    --pink-500: #ff5fa2;
    --pink-700: #d81b72;

    --shadow: 0 16px 46px rgba(17, 24, 39, 0.12);
    --max: 1120px;

    --pad: 24px;
    --pad-sm: 18px;
}

* {
    box-sizing: border-box;
}
body {
    margin: 0;
    font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, Helvetica,
        Arial;
    color: var(--text);
    background: #fff;
    overflow-x: hidden;
}

.container {
    max-width: var(--max);
    margin: 0 auto;
    padding-inline: var(--pad);
}
@media (max-width: 640px) {
    .container {
        padding-inline: var(--pad-sm);
    }
}

/* navbar */
.topbar {
    background: linear-gradient(135deg, var(--pink-500), #ff86bb);
    border-bottom: 1px solid rgba(255, 255, 255, 0.28);
}
.topbar-inner {
    height: 66px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}
.logo {
    width: 38px;
    height: 38px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    border: 1px solid rgba(255, 255, 255, 0.35);
    background: rgba(255, 255, 255, 0.18);
    box-shadow: 0 10px 22px rgba(17, 24, 39, 0.12);
    line-height: 0;
}
.logo-svg {
    display: block;
}
.brand-text {
    font-family: "Dancing Script", cursive;
    font-size: 26px;
    color: #fff;
    text-shadow: 0 8px 18px rgba(17, 24, 39, 0.18);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 14px;
    border-radius: 14px;
    text-decoration: none;
    font-weight: 850;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.btn:hover {
    transform: translateY(-1px);
}

.btn-nav {
    background: rgba(255, 255, 255, 0.95);
    color: var(--pink-700);
    border-color: rgba(255, 255, 255, 0.55);
    box-shadow: 0 12px 26px rgba(17, 24, 39, 0.12);
}

/* bg */
.auth-bg {
    background: radial-gradient(
            900px 380px at 12% 25%,
            rgba(255, 95, 162, 0.18),
            transparent 60%
        ),
        radial-gradient(
            900px 380px at 88% 20%,
            rgba(255, 95, 162, 0.12),
            transparent 55%
        ),
        repeating-linear-gradient(
            90deg,
            var(--pink-50) 0px,
            var(--pink-50) 52px,
            #fff 52px,
            #fff 104px
        );
    min-height: calc(100vh - 66px);
    padding-block: 34px;
}

.auth-wrap {
    width: 100%;
    max-width: 860px;
    margin-inline: auto;
}

.auth-card {
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: 22px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

/* tabs slider */
.tabs {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    background: rgba(255, 255, 255, 0.7);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}
.tab {
    padding: 14px 12px;
    background: transparent;
    border: 0;
    cursor: pointer;
    font-weight: 900;
    color: #7a204b;
    z-index: 2;
}
.tab-indicator {
    pointer-events: none;
    position: absolute;
    inset: 6px auto 6px 6px;
    width: calc(50% - 6px);
    border-radius: 14px;
    background: linear-gradient(135deg, var(--pink-500), #ff86bb);
    box-shadow: 0 14px 30px rgba(255, 95, 162, 0.25);
    transition: transform 0.18s ease;
}
.auth-wrap[data-active="register"] .tab-indicator {
    transform: translateX(100%);
}
.auth-wrap[data-active="login"] .tab[data-tab="login"],
.auth-wrap[data-active="register"] .tab[data-tab="register"] {
    color: #fff;
}

.content {
    padding: 22px;
}
@media (max-width: 520px) {
    .content {
        padding: 16px;
    }
}

/* only one form visible */
.panel {
    display: none;
}
.panel.is-active {
    display: block;
}

.panel h1 {
    margin: 0 0 6px;
    font-size: 24px;
    letter-spacing: -0.2px;
}
.sub {
    margin: 0 0 16px;
    color: var(--muted);
}

.form {
    display: grid;
    gap: 10px;
}

label {
    display: block;
    font-size: 13px;
    color: var(--muted);
    font-weight: 800;
    margin-top: 2px;
}

input {
    width: 100%;
    padding: 12px 14px;
    border-radius: 16px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    outline: none;
    background: #fff;
    font-size: 14px;
}

/* roze fokus */
input:focus {
    border-color: rgba(255, 95, 162, 0.65);
    box-shadow: 0 0 0 4px rgba(255, 95, 162, 0.14);
}

/* roze za polje koje je palo validaciju */
.is-invalid {
    border-color: rgba(255, 95, 162, 0.85) !important;
    box-shadow: 0 0 0 4px rgba(255, 95, 162, 0.16);
}

/* poruka ispod inputa */
.field-error {
    margin-top: -4px;
    font-size: 13px;
    font-weight: 800;
    color: #7a204b;
}

.grid2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}
@media (max-width: 700px) {
    .grid2 {
        grid-template-columns: 1fr;
    }
}

.btn-primary {
    margin-top: 10px;
    width: 100%;
    padding: 12px 16px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--pink-500), #ff86bb);
    color: #fff;
    box-shadow: 0 16px 34px rgba(255, 95, 162, 0.3);
}
.btn-primary:hover {
    box-shadow: 0 20px 42px rgba(255, 95, 162, 0.36);
}

.btn-secondary {
    width: 100%;
    padding: 12px 16px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.92);
    color: #7a204b;
    border: 1px solid rgba(255, 95, 162, 0.22);
    box-shadow: 0 12px 24px rgba(17, 24, 39, 0.08);
}

.hint {
    margin: 6px 0 0;
    color: var(--muted);
    font-size: 13px;
}