@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,200..800;1,200..800&display=swap');

:root {
    --bg:      #0B1426;
    --surface: rgba(255,255,255,0.04);
    --border:  rgba(255,255,255,0.09);
    --accent:  #38BDF8;
    --green:   #34D399;
    --red:     #F87171;
    --muted:   rgba(255,255,255,0.45);
    --radius:  12px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }

body {
    font-family: "Plus Jakarta Sans", sans-serif;
    background: var(--bg);
    color: #fff;
    padding: 48px 16px 24px;
    display: flex;
    flex-direction: column;
}

#auth-canvas {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}
main#signin { position: relative; z-index: 1; }

/*Flash messages */
.message {
    max-width: 420px;
    margin: 0 auto 16px;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 0.875rem;
    text-align: center;
    border: 1px solid;
}
.message.error {
    background: rgba(248,113,113,.1);
    color: var(--red);
    border-color: rgba(248,113,113,.3);
}
.message.success {
    background: rgba(52,211,153,.1);
    color: var(--green);
    border-color: rgba(52,211,153,.3);
}

/*Auth card */
main#signin, main#register {
    background: rgba(11,20,38,0.65);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255,255,255,0.09);
    width: 100%;
    max-width: 420px;
    margin: auto;
    padding: 36px 32px 28px;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: 0 4px 32px rgba(0,0,0,0.4);
}

#signin h1, #register h1 {
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -.02em;
    margin-bottom: 8px;
}
.auth-sub {
    font-size: 0.85rem;
    color: var(--muted);
    margin-bottom: 40px;
}

/*Form */
form { position: relative; margin-top: 18px; }

.name-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 0;
}

.input-group {
    position: relative;
    margin-bottom: 18px;
}

.input-label {
    position: absolute;
    left: 14px;
    top: 13px;
    color: var(--muted);
    transition: all 0.18s ease;
    pointer-events: none;
    background: transparent;
    padding: 0 4px;
    font-size: 0.95rem;
}

form input[type="text"],
form input[type="password"] {
    font-family: "Plus Jakarta Sans", sans-serif;
    width: 100%;
    padding: 14px 12px 12px;
    font-size: 0.95rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    outline: none;
    background: rgba(255,255,255,0.04);
    color: #fff;
    transition: border-color 0.18s, box-shadow 0.18s;
}
form input[type="text"]:hover,
form input[type="password"]:hover { border-color: rgba(255,255,255,.2); }
form input[type="text"]:focus,
form input[type="password"]:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(56,189,248,.15);
}
form input:focus + .input-label,
form input:not(:placeholder-shown) + .input-label {
    top: -9px;
    left: 10px;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--accent);
    background: #131c2e;
    padding: 0 6px;
    border-radius: 4px;
}

/*Shake on error */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    15%       { transform: translateX(-7px); }
    30%       { transform: translateX(7px); }
    45%       { transform: translateX(-4px); }
    60%       { transform: translateX(4px); }
    75%       { transform: translateX(-2px); }
    90%       { transform: translateX(2px); }
}
.shake { animation: shake 0.45s cubic-bezier(.36,.07,.19,.97) both; }

/*Password toggle */
.pwd-toggle {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--muted);
    padding: 4px;
    display: flex;
    align-items: center;
    transition: color .15s;
}
.pwd-toggle:hover { color: #fff; }
.pwd-toggle svg { width: 18px; height: 18px; }
html[data-theme="light"] .pwd-toggle:hover { color: #0f172a; }

/*Remember me (login only) */
.remember-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 4px;
    text-align: left;
    font-size: 0.875rem;
    color: var(--muted);
}
.remember-row input[type="checkbox"] {
    width: 15px;
    height: 15px;
    accent-color: var(--accent);
    cursor: pointer;
    flex-shrink: 0;
}

/*Links */
.form-links {
    display: flex;
    justify-content: center;
    margin: 14px 0 8px;
}
#signin .form-links {
    justify-content: space-between;
}
.form-links a {
    font-size: 0.85rem;
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
}
.form-links a:hover { text-decoration: underline; }

/*Submit button */
#submit_button {
    font-family: "Plus Jakarta Sans", sans-serif;
    width: 100%;
    padding: 13px 0;
    background: var(--accent);
    color: #0B1426;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    margin-top: 10px;
    transition: opacity .15s, transform .05s;
}
#submit_button:hover   { opacity: .85; }
#submit_button:focus   { outline: none; box-shadow: 0 0 0 3px rgba(56,189,248,.25); }
#submit_button:active  { transform: translateY(1px); }
#submit_button:disabled { opacity: .5; cursor: not-allowed; }

/*Light mode */
html[data-theme="light"] {
    --bg:      #f1f5f9;
    --surface: rgba(15,23,42,0.05);
    --border:  rgba(15,23,42,0.12);
    --muted:   rgba(15,23,42,0.5);
}
html[data-theme="light"] body { background: #f1f5f9; color: #0f172a; }
html[data-theme="light"] form input[type="text"],
html[data-theme="light"] form input[type="password"] { background: rgba(0,0,0,.03); color: #0f172a; }
html[data-theme="light"] form input:focus + .input-label,
html[data-theme="light"] form input:not(:placeholder-shown) + .input-label { background: #f1f5f9; padding: 0 6px; }

/*Minimal footer */
.auth-footer {
    text-align: center;
    font-size: 0.78rem;
    color: var(--muted);
    padding: 20px 0 8px;
}

/*Responsive */
@media (max-width: 480px) {
    body { padding-top: 28px; }
    main#signin, main#register { padding: 28px 18px 22px; }
    .name-row { grid-template-columns: 1fr; }
}
/* Focus rings */
a:focus-visible,
button:focus-visible,
input:focus-visible,
label:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }

/* OAuth */
.oauth-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 18px 0 14px;
    color: var(--muted);
    font-size: 0.78rem;
}
.oauth-divider::before,
.oauth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}
.btn-oauth {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 11px 16px;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    transition: background 0.18s, box-shadow 0.18s;
    cursor: pointer;
}
.btn-google {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.10);
    color: #e2e8f0;
}
.btn-google:hover {
    background: rgba(255,255,255,0.11);
    box-shadow: 0 0 0 1px rgba(255,255,255,0.15);
}
html[data-theme="light"] .btn-google {
    background: #fff;
    border-color: rgba(0,0,0,0.12);
    color: #1e293b;
    box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}
html[data-theme="light"] .btn-google:hover {
    background: #f8fafc;
    box-shadow: 0 2px 8px rgba(0,0,0,0.12);
}