:root {
    --color-primary:   #006064;
    --color-primary-dk:#004d50;
    --color-primary-lt:#e0f7fa;
    --color-accent:    #2563eb;
    --color-bg:        #f1f5f9;
    --color-border:    #e2e8f0;
    --color-text:      #1e293b;
    --color-muted:     #64748b;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: 'Poppins', sans-serif;
    min-height: 100vh;
    background: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

/* ── Background decorative circles ────────────────── */
body::before,
body::after {
    content: '';
    position: fixed;
    border-radius: 50%;
    pointer-events: none;
    opacity: .12;
}
body::before {
    width: 600px; height: 600px;
    background: #fff;
    top: -200px; right: -150px;
}
body::after {
    width: 400px; height: 400px;
    background: #fff;
    bottom: -150px; left: -120px;
}

/* ── Login card ────────────────────────────────────── */
.login-card {
    position: relative;
    z-index: 10;
    width: 100%;
    max-width: 420px;
    margin: 1.5rem;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 24px 60px rgba(0,0,0,.35), 0 4px 16px rgba(0,0,0,.2);
    animation: slideUp .4s ease;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(24px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── Card header (brand area) ──────────────────────── */
.login-header {
    background: var(--color-primary-dk);
    padding: 2.5rem 2rem 2rem;
    text-align: center;
    position: relative;
    border-bottom: 1px solid rgba(255,255,255,.08);
}

.login-logo {
    display: block;
    margin: 0 auto;
    width: auto;
    height: 64px;
    filter: brightness(0) invert(1);
}

.login-tagline {
    display: block;
    margin-top: .75rem;
    font-size: .78rem;
    font-weight: 400;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: rgba(255,255,255,.5);
}

/* ── Card body (form area) ─────────────────────────── */
.login-body {
    background: #fff;
    padding: 2rem 2rem 2.25rem;
}

.login-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 1.5rem;
    text-align: center;
    letter-spacing: -.01em;
}

/* ── Alert ─────────────────────────────────────────── */
.login-alert {
    display: none;
    align-items: flex-start;
    gap: .5rem;
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: 10px;
    color: #b91c1c;
    font-size: .82rem;
    padding: .65rem .85rem;
    margin-bottom: 1.25rem;
    line-height: 1.4;
}
.login-alert.visible { display: flex; }
.login-alert i { font-size: 1rem; flex-shrink: 0; margin-top: 1px; }

/* ── Form fields ───────────────────────────────────── */
.field-wrap {
    position: relative;
    margin-bottom: 1rem;
}

.field-wrap .field-icon {
    position: absolute;
    left: .9rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-muted);
    font-size: .95rem;
    pointer-events: none;
    transition: color .15s;
}

.field-wrap input {
    width: 100%;
    padding: .7rem .85rem .7rem 2.4rem;
    font-family: 'Poppins', sans-serif;
    font-size: .875rem;
    color: var(--color-text);
    background: var(--color-bg);
    border: 1.5px solid var(--color-border);
    border-radius: 10px;
    outline: none;
    transition: border-color .15s, box-shadow .15s, background .15s;
}

.field-wrap input::placeholder { color: #94a3b8; }

.field-wrap input:focus {
    background: #fff;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0,96,100,.12);
}

.field-wrap input:focus + .field-icon,
.field-wrap:focus-within .field-icon {
    color: var(--color-primary);
}

/* Password toggle */
.btn-toggle-pass {
    position: absolute;
    right: .75rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: #94a3b8;
    font-size: .95rem;
    cursor: pointer;
    padding: .15rem;
    line-height: 1;
    transition: color .15s;
}
.btn-toggle-pass:hover { color: var(--color-primary); }

/* ── Submit button ─────────────────────────────────── */
.btn-login {
    width: 100%;
    padding: .75rem;
    margin-top: .5rem;
    background: var(--color-primary);
    border: none;
    border-radius: 10px;
    color: #fff;
    font-family: 'Poppins', sans-serif;
    font-size: .9rem;
    font-weight: 600;
    letter-spacing: .02em;
    cursor: pointer;
    transition: background .18s, transform .12s, box-shadow .18s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
}
.btn-login:hover  { background: var(--color-primary-dk); box-shadow: 0 4px 14px rgba(0,96,100,.35); }
.btn-login:active { transform: scale(.985); }
.btn-login:disabled { opacity: .65; cursor: not-allowed; transform: none; }

.btn-login .spinner {
    display: none;
    width: 16px; height: 16px;
    border: 2px solid rgba(255,255,255,.35);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin .6s linear infinite;
}
.btn-login.loading .spinner { display: block; }
.btn-login.loading .btn-text { opacity: .6; }

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

/* ── Footer ────────────────────────────────────────── */
.login-footer {
    background: #fff;
    text-align: center;
    padding: 0 2rem 1.5rem;
    font-size: .72rem;
    color: #94a3b8;
    border-top: 1px solid var(--color-border);
    padding-top: 1rem;
}