:root {
    --primary: #258cc9;
    --primary-dark: #1c6ea3;
    --primary-light: #e8f4fb;
    --primary-glow: rgba(37, 140, 201, 0.16);
    --danger: #ef4444;
    --bg: #fbfef9;
    --card-bg: #ffffff;
    --text: #11221c;
    --text-muted: #1c3b2f;
    --border: #dcebe4;
    --shadow-hover: 0 20px 60px rgba(0, 0, 0, 0.08);
    --radius-lg: 28px;
    --transition: 0.25s cubic-bezier(.4,0,.2,1);
}
[data-theme="dark"] {
    --bg: #0a120f;
    --card-bg: #111f19;
    --text: #ecf3f0;
    --text-muted: #c9dad2;
    --border: #20362c;
    --primary: #38bdf8;
    --primary-dark: #0ea5e9;
    --primary-light: #10293a;
    --primary-glow: rgba(56, 189, 248, 0.22);
}
.squircle { border-radius: var(--radius-lg); }
@supports (corner-shape: squircle) {
    .squircle { corner-shape: squircle; border-radius: var(--radius-lg); }
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: "Mozilla Text", -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    position: relative;
    overflow: hidden;
    transition: background var(--transition), color var(--transition);
}
#particlesCanvas {
    position: fixed; inset: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none;
    opacity: 0; transition: opacity 0.6s ease;
}
[data-theme="dark"] #particlesCanvas { opacity: 1; }
html.no-bg-animation #particlesCanvas { display: none !important; }

.theme-toggle {
    position: fixed; top: 22px; right: 24px; font-size: 18px; color: var(--text-muted);
    cursor: pointer; z-index: 2; transition: color var(--transition), transform var(--transition);
}
.theme-toggle:hover { color: var(--primary); transform: rotate(-14deg); }

.login-card {
    position: relative; z-index: 1;
    background: var(--card-bg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-hover);
    padding: 52px 44px;
    width: 100%;
    max-width: 400px;
    text-align: center;
}
.login-logo {
    width: 62px; height: 62px; margin: 0 auto 18px;
    background: #fff;
    border-radius: 18px;
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-size: 26px; padding: 4px;
    box-shadow: 0 10px 24px var(--primary-glow);
}
.login-logo img { width: 100%; height: 100%; object-fit: contain; border-radius: inherit; }
@supports (corner-shape: squircle) { .login-logo { corner-shape: squircle; } }

.login-card h1 { font-size: 21px; font-weight: 700; letter-spacing: -0.01em; margin-bottom: 4px; }
.login-card h1 span { color: var(--primary); }
.login-card p.subtitle { color: var(--text-muted); font-size: 13px; margin-bottom: 34px; }

.login-tabs {
    display: flex; gap: 6px; background: var(--bg); border: 1px solid var(--border);
    border-radius: 13px; padding: 4px; margin: 18px 0 10px;
}
.login-tab {
    flex: 1; padding: 9px 10px; border: none; border-radius: 10px; background: transparent;
    color: var(--text-muted); font-size: 13px; font-weight: 600; font-family: inherit;
    cursor: pointer; transition: background var(--transition), color var(--transition);
}
.login-tab i { margin-right: 6px; }
.login-tab.active { background: var(--primary); color: #fff; }
.login-tab:not(.active):hover { background: var(--border); }

.login-form { text-align: left; }
.field-group { margin-bottom: 18px; }
.field-group label {
    display: block; font-size: 11px; font-weight: 700; color: var(--text-muted);
    text-transform: uppercase; letter-spacing: 0.4px; margin-bottom: 7px;
}
.field-group input {
    width: 100%; padding: 12px 15px; border: 1px solid var(--border); border-radius: 13px;
    background: var(--bg); color: var(--text); font-size: 14px; font-family: inherit;
    transition: border var(--transition), box-shadow var(--transition);
}
.field-group input:focus {
    outline: none; border-color: var(--primary); box-shadow: 0 0 0 4px var(--primary-glow);
}

.login-btn {
    width: 100%; padding: 13px; margin-top: 8px;
    background: var(--primary); color: #fff; border: none; border-radius: 13px;
    font-size: 14px; font-weight: 700; font-family: inherit; cursor: pointer;
    transition: background var(--transition), transform var(--transition);
    display: flex; align-items: center; justify-content: center; gap: 8px;
}
.login-btn:hover { background: var(--primary-dark); transform: translateY(-1px); }
.login-btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.login-error {
    display: none;
    background: #fdecea; color: #b91c1c; border: 1px solid #f3c7c5;
    border-radius: 12px; padding: 10px 14px; font-size: 13px; margin-bottom: 16px;
    align-items: center; gap: 8px;
}
[data-theme="dark"] .login-error { background: #2a1414; border-color: #4a1f1f; color: #f29b9b; }
.login-error.show { display: flex; }

.login-footer { margin-top: 26px; font-size: 11px; color: var(--text-muted); }
.login-footer a { color: var(--primary); font-weight: 600; text-decoration: none; }

@media (max-width: 480px) {
    .login-card { padding: 40px 26px; }
}