* {
    box-sizing: border-box;
}

/* ===== BODY ===== */
body {
    margin: 0;
    font-family:
        "Inter",
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        Roboto,
        Arial,
        sans-serif;

    height: 100vh;

    display: flex;
    align-items: center;
    justify-content: center;

    background:
        radial-gradient(circle at 20% 30%, #dbeafe, transparent 40%),
        radial-gradient(circle at 80% 70%, #e0e7ff, transparent 40%),
        #f8fafc;

    color: #0f172a;
}

/* ===== CONTAINER ===== */
.login-container {
    width: 100%;
    max-width: 380px;
    padding: 0 20px;
}

/* ===== CARD ===== */
.login-box {
    background: rgba(255,255,255,0.75);
    backdrop-filter: blur(12px);

    padding: 34px 28px;

    border-radius: 18px;

    border: 1px solid rgba(255,255,255,0.4);

    box-shadow:
        0 10px 30px rgba(0,0,0,0.08),
        0 2px 6px rgba(0,0,0,0.05);

    text-align: center;
}

/* ===== TITLE ===== */
.login-box h1 {
    margin-bottom: 24px;
    font-size: 22px;
    font-weight: 600;
}

/* ===== FORM ===== */
.login-box form {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

/* ===== INPUT ===== */
.login-box input[type="text"],
.login-box input[type="password"] {
    padding: 11px 12px;

    border-radius: 10px;
    border: 1px solid #e2e8f0;

    font-size: 14px;

    transition: all 0.2s ease;
}

/* focus эффект */
.login-box input:focus {
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
    outline: none;
}

/* ===== BUTTON ===== */
.login-box button {
    margin-top: 6px;

    padding: 11px;

    border-radius: 10px;
    border: none;

    background: #3b82f6;
    color: white;

    font-size: 14px;
    font-weight: 500;

    cursor: pointer;

    transition: all 0.2s ease;
}

.login-box button:hover {
    background: #2563eb;
    transform: translateY(-1px);
}

/* ===== ERROR ===== */
.error {
    background: #fee2e2;
    color: #991b1b;

    padding: 8px 10px;

    border-radius: 8px;

    font-size: 13px;
    font-weight: 500;

    margin-bottom: 5px;
}

/* ===== NOTE ===== */
.note {
    font-size: 12px;
    color: #64748b;
    margin-top: 12px;
}

/* ===== LOGO (БОНУС) ===== */
.login-logo {
    margin-bottom: 16px;
    font-weight: 600;
    font-size: 16px;
}

.login-logo span {
    opacity: 0.5;
    font-size: 12px;
}

/* ===== ADAPTIVE ===== */
@media (max-width: 480px) {
    .login-box {
        padding: 26px 20px;
    }
}

/* ===== DARK THEME ===== */
@media (prefers-color-scheme: dark) {

    body {
        background:
            radial-gradient(circle at 20% 30%, #1e293b, transparent 40%),
            radial-gradient(circle at 80% 70%, #312e81, transparent 40%),
            #020617;

        color: #e2e8f0;
    }

    /* ===== CARD ===== */
    .login-box {
        background: rgba(15,23,42,0.7);
        backdrop-filter: blur(14px);

        border: 1px solid rgba(255,255,255,0.05);

        box-shadow:
            0 10px 30px rgba(0,0,0,0.6),
            0 2px 6px rgba(0,0,0,0.4);
    }

    /* TITLE */
    .login-box h1 {
        color: #f1f5f9;
    }

    /* INPUT */
    .login-box input[type="text"],
    .login-box input[type="password"] {
        background: #020617;
        border: 1px solid #1e293b;
        color: #e2e8f0;
    }

    .login-box input::placeholder {
        color: #64748b;
    }

    /* focus */
    .login-box input:focus {
        border-color: #60a5fa;
        box-shadow: 0 0 0 3px rgba(96,165,250,0.2);
    }

    /* BUTTON */
    .login-box button {
        background: #2563eb;
    }

    .login-box button:hover {
        background: #1d4ed8;
    }

    /* ERROR */
    .error {
        background: rgba(127,29,29,0.2);
        color: #fecaca;
        border: 1px solid rgba(248,113,113,0.2);
    }

    /* NOTE */
    .note {
        color: #94a3b8;
    }

    /* LOGO */
    .login-logo {
        color: #e2e8f0;
    }

    .login-logo span {
        opacity: 0.4;
    }
}